72878432 has 24 divisors (see below), whose sum is σ = 156523752. Its totient is φ = 33126400.

The previous prime is 72878431. The next prime is 72878453. The reversal of 72878432 is 23487827.

It is a super-2 number, since 2×72878432² = 10622531701557248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72878432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72878431) 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, 103169 + ... + 103872.

It is an arithmetic number, because the mean of its divisors is an integer number (6521823).

Almost surely, 2^72878432 is an apocalyptic number.

It is an amenable number.

72878432 is an abundant number, since it is smaller than the sum of its proper divisors (83645320).

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

72878432 is a wasteful number, since it uses less digits than its factorization.

72878432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207062 (or 207054 counting only the distinct ones).

The product of its digits is 150528, while the sum is 41.

The square root of 72878432 is about 8536.8865518994. The cubic root of 72878432 is about 417.7017935180.

The spelling of 72878432 in words is "seventy-two million, eight hundred seventy-eight thousand, four hundred thirty-two".