72644836 has 12 divisors (see below), whose sum is σ = 138685680. Its totient is φ = 33020360.

The previous prime is 72644807. The next prime is 72644851. The reversal of 72644836 is 63844627.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825466 + ... + 825553.

It is an arithmetic number, because the mean of its divisors is an integer number (11557140).

Almost surely, 2^72644836 is an apocalyptic number.

It is an amenable number.

72644836 is a deficient number, since it is larger than the sum of its proper divisors (66040844).

72644836 is a wasteful number, since it uses less digits than its factorization.

72644836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651034 (or 1651032 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 72644836 is about 8523.1940022506. The cubic root of 72644836 is about 417.2550316906.

It can be divided in two parts, 7264 and 4836, that added together give a square (12100 = 110²).

The spelling of 72644836 in words is "seventy-two million, six hundred forty-four thousand, eight hundred thirty-six".