72779936 has 24 divisors (see below), whose sum is σ = 144154080. Its totient is φ = 36169408.

The previous prime is 72779921. The next prime is 72779947. The reversal of 72779936 is 63997727.

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, 1466 + ... + 12153.

It is an arithmetic number, because the mean of its divisors is an integer number (6006420).

Almost surely, 2^72779936 is an apocalyptic number.

It is an amenable number.

72779936 is a deficient number, since it is larger than the sum of its proper divisors (71374144).

72779936 is a wasteful number, since it uses less digits than its factorization.

72779936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13796 (or 13788 counting only the distinct ones).

The product of its digits is 1000188, while the sum is 50.

The square root of 72779936 is about 8531.1157535225. The cubic root of 72779936 is about 417.5135324955.

The spelling of 72779936 in words is "seventy-two million, seven hundred seventy-nine thousand, nine hundred thirty-six".