57655590 has 32 divisors (see below), whose sum is σ = 138882816. Its totient is φ = 15318240.

The previous prime is 57655579. The next prime is 57655597. The reversal of 57655590 is 9555675.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57655597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5095 + ... + 11885.

It is an arithmetic number, because the mean of its divisors is an integer number (4340088).

Almost surely, 2^57655590 is an apocalyptic number.

57655590 is an abundant number, since it is smaller than the sum of its proper divisors (81227226).

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

57655590 is a wasteful number, since it uses less digits than its factorization.

57655590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084.

The product of its (nonzero) digits is 236250, while the sum is 42.

The square root of 57655590 is about 7593.1278140171. The cubic root of 57655590 is about 386.3199536060.

The spelling of 57655590 in words is "fifty-seven million, six hundred fifty-five thousand, five hundred ninety".