57117980 has 12 divisors (see below), whose sum is σ = 119947800. Its totient is φ = 22847184.

The previous prime is 57117937. The next prime is 57118001. The reversal of 57117980 is 8971175.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1427930 + ... + 1427969.

It is an arithmetic number, because the mean of its divisors is an integer number (9995650).

Almost surely, 2^57117980 is an apocalyptic number.

It is an amenable number.

57117980 is an abundant number, since it is smaller than the sum of its proper divisors (62829820).

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

57117980 is a wasteful number, since it uses less digits than its factorization.

57117980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855908 (or 2855906 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 57117980 is about 7557.6438127236. The cubic root of 57117980 is about 385.1154542142.

The spelling of 57117980 in words is "fifty-seven million, one hundred seventeen thousand, nine hundred eighty".