57655990 has 64 divisors (see below), whose sum is σ = 123513984. Its totient is φ = 18966528.

The previous prime is 57655967. The next prime is 57656003. The reversal of 57655990 is 9955675.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 57655990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292572 + ... + 292768.

It is an arithmetic number, because the mean of its divisors is an integer number (1929906).

Almost surely, 2^57655990 is an apocalyptic number.

57655990 is an abundant number, since it is smaller than the sum of its proper divisors (65857994).

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

57655990 is a wasteful number, since it uses less digits than its factorization.

57655990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 425250, while the sum is 46.

The square root of 57655990 is about 7593.1541535781. The cubic root of 57655990 is about 386.3208470008.

The spelling of 57655990 in words is "fifty-seven million, six hundred fifty-five thousand, nine hundred ninety".