218388 (number)
218,388 (two hundred eighteen thousand three hundred eightyeight) is an even sixdigits composite number following 218387 and preceding 218389. In scientific notation, it is written as 2.18388 × 10^{5}. The sum of its digits is 30. It has a total of 4 prime factors and 12 positive divisors. There are 72,792 positive integers (up to 218388) that are relatively prime to 218388.
Basic properties
 Is Prime? No
 Number parity Even
 Number length 6
 Sum of Digits 30
 Digital Root 3
Name
Short name  218 thousand 388 

Full name  two hundred eighteen thousand three hundred eightyeight 
Notation
Scientific notation  2.18388 × 10^{5} 

Engineering notation  218.388 × 10^{3} 
Prime Factorization of 218388
Prime Factorization 2^{2} × 3 × 18199
Composite numberω(n)  Distinct Factors  3  Total number of distinct prime factors 

Ω(n)  Total Factors  4  Total number of prime factors 
rad(n)  Radical  109194  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  0  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 218,388 is 2^{2} × 3 × 18199. Since it has a total of 4 prime factors, 218,388 is a composite number.
Divisors of 218388
12 divisors
τ(n)  Total Divisors  12  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  509600  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  291212  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  42466.666  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  467.32001883078  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  5.1425745682889  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 218,388 can be divided by 12 positive divisors (out of which 8 are even, and 4 are odd). The sum of these divisors (counting 218,388) is 509,600, the average is 424,66.,666.
Other Arithmetic Functions (n = 218388)
φ(n)  Euler Totient  72792  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  18198  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 19431  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 72,792 positive integers (less than 218,388) that are coprime with 218,388. And there are approximately 19,431 prime numbers less than or equal to 218,388.
Divisibility of 218388
m  2  3  4  5  6  7  8  9 

n mod m  0  0  0  3  0  2  4  3 
The number 218,388 is divisible by 2, 3, 4 and 6.
Classification of 218388
By Arithmetic functions
 Refactorable
 Abundant
Expressible via specific sums
 Polite
 Nonhypotenuse
Base conversion (218388)
Base  System  Value 

2  Binary  110101010100010100 
3  Ternary  102002120110 
4  Quaternary  311110110 
5  Quinary  23442023 
6  Senary  4403020 
8  Octal  652424 
10  Decimal  218388 
12  Duodecimal  a6470 
16  Hexadecimal  35514 
20  Vigesimal  175j8 
36  Base36  4oic 
Basic calculations (n = 218388)
Multiplication
n×yn×2  436776 

n×3  655164 
n×4  873552 
n×5  1091940 
Division
n÷yn÷2  109194.000 

n÷3  72796.000 
n÷4  54597.000 
n÷5  43677.600 
Exponentiation
n^{y}n^{2}  47693318544 

n^{3}  10415648450187072 
n^{4}  2274652633739454279936 
n^{5}  496756839377091941286663168 
Nth Root
^{y}√n^{2}√n  467.32001883078 

^{3}√n  60.220301243829 
^{4}√n  21.617585869629 
^{5}√n  11.690841006205 
218388 as geometric shapes
Circle
Radius = nDiameter  436776 

Circumference  1372172.2728643 
Area  149832979163.15 
Sphere
Radius = nVolume  4.3628966204642E+16 

Surface area  599331916652.59 
Circumference  1372172.2728643 
Square
Length = nPerimeter  873552 

Area  47693318544 
Diagonal  308847.27145954 
Cube
Length = nSurface area  286159911264 

Volume  10415648450187072 
Space diagonal  378259.11176335 
Equilateral Triangle
Length = nPerimeter  655164 

Area  20651812724.944 
Altitude  189129.55588168 
Triangular Pyramid
Length = nSurface area  82607250899.775 

Volume  1.2274959415971E+15 
Height  178313.05531564 
Cryptographic Hash Functions
md5  b8afbdb9916ef713e51d0397cd901a42 

sha1  539678da80850fc7d5ce7ead077d542b87f68756 
sha256  528bd32f6ad36c9aaa39a218e28916de9ad172368b9beadd8cf1ddc5ac36b0dd 
sha512  626d1d8a046d566f16a2b473087f24db775e2295c1e577a65bf24feae328819e02ba9c6040394c483531985673f570027e6ae43f791dfd711f28dba659545a54 
ripemd160  72b6364f13fea8d93a122bdfa3c600605308e241 