72915872 has 24 divisors (see below), whose sum is σ = 143986500. Its totient is φ = 36347904.

The previous prime is 72915859. The next prime is 72915881. The reversal of 72915872 is 27851927.

It can be written as a sum of positive squares in 2 ways, for example, as 71842576 + 1073296 = 8476^2 + 1036^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7904 + ... + 14432.

Almost surely, 2^72915872 is an apocalyptic number.

It is an amenable number.

72915872 is a deficient number, since it is larger than the sum of its proper divisors (71070628).

72915872 is a wasteful number, since it uses less digits than its factorization.

72915872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6888 (or 6880 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 72915872 is about 8539.0791072574. The cubic root of 72915872 is about 417.7733102317.

The spelling of 72915872 in words is "seventy-two million, nine hundred fifteen thousand, eight hundred seventy-two".