72900918 has 16 divisors (see below), whose sum is σ = 162002160. Its totient is φ = 24300288.

The previous prime is 72900907. The next prime is 72900937. The reversal of 72900918 is 81900927.

It is a happy number.

It is a super-3 number, since 3×72900918³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674955 + ... + 675062.

It is an arithmetic number, because the mean of its divisors is an integer number (10125135).

Almost surely, 2^72900918 is an apocalyptic number.

72900918 is an abundant number, since it is smaller than the sum of its proper divisors (89101242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72900918 is a wasteful number, since it uses less digits than its factorization.

72900918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350028 (or 1350022 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 72900918 is about 8538.2034410056. The cubic root of 72900918 is about 417.7447485069.

Subtracting 72900918 from its reverse (81900927), we obtain a palindrome (9000009).

The spelling of 72900918 in words is "seventy-two million, nine hundred thousand, nine hundred eighteen".