57131688 has 16 divisors (see below), whose sum is σ = 142829280. Its totient is φ = 19043888.

The previous prime is 57131671. The next prime is 57131699. The reversal of 57131688 is 88613175.

57131688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 1190220 + ... + 1190267.

It is an arithmetic number, because the mean of its divisors is an integer number (8926830).

Almost surely, 2^57131688 is an apocalyptic number.

It is an amenable number.

57131688 is an abundant number, since it is smaller than the sum of its proper divisors (85697592).

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

57131688 is a wasteful number, since it uses less digits than its factorization.

57131688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380496 (or 2380492 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 57131688 is about 7558.5506547221. The cubic root of 57131688 is about 385.1462602778.

The spelling of 57131688 in words is "fifty-seven million, one hundred thirty-one thousand, six hundred eighty-eight".