72912432 has 40 divisors (see below), whose sum is σ = 192956400. Its totient is φ = 23710720.

The previous prime is 72912421. The next prime is 72912451. The reversal of 72912432 is 23421927.

It is a self number, because there is not a number n which added to its sum of digits gives 72912432.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16557 + ... + 20492.

It is an arithmetic number, because the mean of its divisors is an integer number (4823910).

Almost surely, 2^72912432 is an apocalyptic number.

It is an amenable number.

72912432 is an abundant number, since it is smaller than the sum of its proper divisors (120043968).

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

72912432 is a wasteful number, since it uses less digits than its factorization.

72912432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37101 (or 37095 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 72912432 is about 8538.8776780090. The cubic root of 72912432 is about 417.7667402731.

The spelling of 72912432 in words is "seventy-two million, nine hundred twelve thousand, four hundred thirty-two".