72812618 has 12 divisors (see below), whose sum is σ = 114175698. Its totient is φ = 34822920.

The previous prime is 72812599. The next prime is 72812639. The reversal of 72812618 is 81621827.

It can be written as a sum of positive squares in only one way, i.e., 72812089 + 529 = 8533^2 + 23^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33353 + ... + 35468.

Almost surely, 2^72812618 is an apocalyptic number.

72812618 is a deficient number, since it is larger than the sum of its proper divisors (41363080).

72812618 is a wasteful number, since it uses less digits than its factorization.

72812618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68869 (or 68846 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 72812618 is about 8533.0309972483. The cubic root of 72812618 is about 417.5760182851.

The spelling of 72812618 in words is "seventy-two million, eight hundred twelve thousand, six hundred eighteen".