57381140 has 96 divisors (see below), whose sum is σ = 135475200. Its totient is φ = 20321280.

The previous prime is 57381119. The next prime is 57381173. The reversal of 57381140 is 4118375.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451757 + ... + 451883.

It is an arithmetic number, because the mean of its divisors is an integer number (1411200).

Almost surely, 2^57381140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57381140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67737600).

57381140 is an abundant number, since it is smaller than the sum of its proper divisors (78094060).

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

57381140 is a wasteful number, since it uses less digits than its factorization.

57381140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 57381140 is about 7575.0339933231. The cubic root of 57381140 is about 385.7059964252.

The spelling of 57381140 in words is "fifty-seven million, three hundred eighty-one thousand, one hundred forty".