57361820 has 24 divisors (see below), whose sum is σ = 120657600. Its totient is φ = 22907072.

The previous prime is 57361813. The next prime is 57361879. The reversal of 57361820 is 2816375.

It is a happy number.

It is a congruent number.

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, 12386 + ... + 16374.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^57361820 is an apocalyptic number.

It is an amenable number.

57361820 is an abundant number, since it is smaller than the sum of its proper divisors (63295780).

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

57361820 is a wasteful number, since it uses less digits than its factorization.

57361820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717 (or 4715 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 57361820 is about 7573.7586441608. The cubic root of 57361820 is about 385.6627030112.

The spelling of 57361820 in words is "fifty-seven million, three hundred sixty-one thousand, eight hundred twenty".