72257864 has 16 divisors (see below), whose sum is σ = 154838400. Its totient is φ = 30967632.

The previous prime is 72257851. The next prime is 72257909. The reversal of 72257864 is 46875227.

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, 645104 + ... + 645215.

It is an arithmetic number, because the mean of its divisors is an integer number (9677400).

Almost surely, 2^72257864 is an apocalyptic number.

It is an amenable number.

72257864 is an abundant number, since it is smaller than the sum of its proper divisors (82580536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72257864 is a wasteful number, since it uses less digits than its factorization.

72257864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290332 (or 1290328 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 72257864 is about 8500.4625756485. The cubic root of 72257864 is about 416.5128198596.

The spelling of 72257864 in words is "seventy-two million, two hundred fifty-seven thousand, eight hundred sixty-four".