72636885 has 16 divisors (see below), whose sum is σ = 129132480. Its totient is φ = 38739600.

The previous prime is 72636857. The next prime is 72636887. The reversal of 72636885 is 58863627.

72636885 is a `hidden beast` number, since 7 + 2 + 636 + 8 + 8 + 5 = 666.

It is not a de Polignac number, because 72636885 - 2⁵ = 72636853 is a prime.

It is a super-2 number, since 2×72636885² = 10552234125006450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72636885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72636887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268891 + ... + 269160.

It is an arithmetic number, because the mean of its divisors is an integer number (8070780).

Almost surely, 2^72636885 is an apocalyptic number.

It is an amenable number.

72636885 is a deficient number, since it is larger than the sum of its proper divisors (56495595).

72636885 is a wasteful number, since it uses less digits than its factorization.

72636885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538065 (or 538059 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 72636885 is about 8522.7275563636. The cubic root of 72636885 is about 417.2398082373.

The spelling of 72636885 in words is "seventy-two million, six hundred thirty-six thousand, eight hundred eighty-five".