72856424 has 16 divisors (see below), whose sum is σ = 144641700. Its totient is φ = 34285312.

The previous prime is 72856423. The next prime is 72856429. The reversal of 72856424 is 42465827.

It can be written as a sum of positive squares in 2 ways, for example, as 58033924 + 14822500 = 7618^2 + 3850^2 .

It is not an unprimeable number, because it can be changed into a prime (72856423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267719 + ... + 267990.

Almost surely, 2^72856424 is an apocalyptic number.

It is an amenable number.

72856424 is a deficient number, since it is larger than the sum of its proper divisors (71785276).

72856424 is a wasteful number, since it uses less digits than its factorization.

72856424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535732 (or 535728 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 72856424 is about 8535.5974600493. The cubic root of 72856424 is about 417.6597430955.

The spelling of 72856424 in words is "seventy-two million, eight hundred fifty-six thousand, four hundred twenty-four".