57391380 has 36 divisors (see below), whose sum is σ = 174087732. Its totient is φ = 15304320.

The previous prime is 57391363. The next prime is 57391391. The reversal of 57391380 is 8319375.

57391380 is a `hidden beast` number, since 573 + 9 + 1 + 3 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36433296 + 20958084 = 6036^2 + 4578^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159241 + ... + 159600.

Almost surely, 2^57391380 is an apocalyptic number.

It is an amenable number.

57391380 is an abundant number, since it is smaller than the sum of its proper divisors (116696352).

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

57391380 is a wasteful number, since it uses less digits than its factorization.

57391380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318856 (or 318851 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 57391380 is about 7575.7098677286. The cubic root of 57391380 is about 385.7289388907.

The spelling of 57391380 in words is "fifty-seven million, three hundred ninety-one thousand, three hundred eighty".