72531408 has 40 divisors (see below), whose sum is σ = 187695328. Its totient is φ = 24135552.

The previous prime is 72531377. The next prime is 72531421. The reversal of 72531408 is 80413527.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41235 + ... + 42957.

Almost surely, 2^72531408 is an apocalyptic number.

It is an amenable number.

72531408 is an abundant number, since it is smaller than the sum of its proper divisors (115163920).

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

72531408 is a wasteful number, since it uses less digits than its factorization.

72531408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611 (or 2605 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 72531408 is about 8516.5373245234. The cubic root of 72531408 is about 417.0377505519.

The spelling of 72531408 in words is "seventy-two million, five hundred thirty-one thousand, four hundred eight".