57655290 has 96 divisors (see below), whose sum is σ = 173900160. Its totient is φ = 11975040.

The previous prime is 57655271. The next prime is 57655321. The reversal of 57655290 is 9255675.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24276 + ... + 26544.

It is an arithmetic number, because the mean of its divisors is an integer number (1811460).

Almost surely, 2^57655290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57655290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86950080).

57655290 is an abundant number, since it is smaller than the sum of its proper divisors (116244870).

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

57655290 is a wasteful number, since it uses less digits than its factorization.

57655290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 57655290 is about 7593.1080592864. The cubic root of 57655290 is about 386.3192835571.

The spelling of 57655290 in words is "fifty-seven million, six hundred fifty-five thousand, two hundred ninety".