57561380 has 24 divisors (see below), whose sum is σ = 121132032. Its totient is φ = 22976352.

The previous prime is 57561379. The next prime is 57561407. The reversal of 57561380 is 8316575.

It is a self number, because there is not a number n which added to its sum of digits gives 57561380.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709 + ... + 13211.

It is an arithmetic number, because the mean of its divisors is an integer number (5047168).

Almost surely, 2^57561380 is an apocalyptic number.

It is an amenable number.

57561380 is an abundant number, since it is smaller than the sum of its proper divisors (63570652).

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

57561380 is a wasteful number, since it uses less digits than its factorization.

57561380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035 (or 6033 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 57561380 is about 7586.9216418782. The cubic root of 57561380 is about 386.1094215815.

The spelling of 57561380 in words is "fifty-seven million, five hundred sixty-one thousand, three hundred eighty".