72816736 has 24 divisors (see below), whose sum is σ = 144842040. Its totient is φ = 36031488.

The previous prime is 72816713. The next prime is 72816791. The reversal of 72816736 is 63761827.

It is a congruent 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, 8626 + ... + 14833.

It is an arithmetic number, because the mean of its divisors is an integer number (6035085).

Almost surely, 2^72816736 is an apocalyptic number.

It is an amenable number.

72816736 is a deficient number, since it is larger than the sum of its proper divisors (72025304).

72816736 is a wasteful number, since it uses less digits than its factorization.

72816736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23566 (or 23558 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 72816736 is about 8533.2722914483. The cubic root of 72816736 is about 417.5838902981.

The spelling of 72816736 in words is "seventy-two million, eight hundred sixteen thousand, seven hundred thirty-six".