57991560 has 64 divisors (see below), whose sum is σ = 189794880. Its totient is φ = 14058240.

The previous prime is 57991537. The next prime is 57991613. The reversal of 57991560 is 6519975.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20647 + ... + 23286.

It is an arithmetic number, because the mean of its divisors is an integer number (2965545).

Almost surely, 2^57991560 is an apocalyptic number.

It is an amenable number.

57991560 is an abundant number, since it is smaller than the sum of its proper divisors (131803320).

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

57991560 is a wasteful number, since it uses less digits than its factorization.

57991560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43958 (or 43954 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 57991560 is about 7615.2189725575. The cubic root of 57991560 is about 387.0688871756.

It can be divided in two parts, 579915 and 60, that added together give a palindrome (579975).

The spelling of 57991560 in words is "fifty-seven million, nine hundred ninety-one thousand, five hundred sixty".