57991372 has 36 divisors (see below), whose sum is σ = 108316656. Its totient is φ = 27112800.

The previous prime is 57991357. The next prime is 57991393. The reversal of 57991372 is 27319975.

57991372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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 11 ways as a sum of consecutive naturals, for example, 574122 + ... + 574222.

It is an arithmetic number, because the mean of its divisors is an integer number (3008796).

Almost surely, 2^57991372 is an apocalyptic number.

It is an amenable number.

57991372 is a deficient number, since it is larger than the sum of its proper divisors (50325284).

57991372 is a wasteful number, since it uses less digits than its factorization.

57991372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 205 counting only the distinct ones).

The product of its digits is 119070, while the sum is 43.

The square root of 57991372 is about 7615.2066288447. The cubic root of 57991372 is about 387.0684689019.

The spelling of 57991372 in words is "fifty-seven million, nine hundred ninety-one thousand, three hundred seventy-two".