72856580 has 48 divisors (see below), whose sum is σ = 157489920. Its totient is φ = 28297728.

The previous prime is 72856561. The next prime is 72856607. The reversal of 72856580 is 8565827.

72856580 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

72856580 is strictly pandigital in base 9.

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 15 ways as a sum of consecutive naturals, for example, 168044 + ... + 168476.

It is an arithmetic number, because the mean of its divisors is an integer number (3281040).

Almost surely, 2^72856580 is an apocalyptic number.

It is an amenable number.

72856580 is an abundant number, since it is smaller than the sum of its proper divisors (84633340).

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

72856580 is a wasteful number, since it uses less digits than its factorization.

72856580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 72856580 is about 8535.6065982448. The cubic root of 72856580 is about 417.6600411926.

The spelling of 72856580 in words is "seventy-two million, eight hundred fifty-six thousand, five hundred eighty".