72057988 has 24 divisors (see below), whose sum is σ = 131947200. Its totient is φ = 34367520.

The previous prime is 72057983. The next prime is 72057989. The reversal of 72057988 is 88975027.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (72057983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41563 + ... + 43261.

It is an arithmetic number, because the mean of its divisors is an integer number (5497800).

Almost surely, 2^72057988 is an apocalyptic number.

It is an amenable number.

72057988 is a deficient number, since it is larger than the sum of its proper divisors (59889212).

72057988 is a wasteful number, since it uses less digits than its factorization.

72057988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 72057988 is about 8488.6976621859. The cubic root of 72057988 is about 416.1284197337.

The spelling of 72057988 in words is "seventy-two million, fifty-seven thousand, nine hundred eighty-eight".