57557840 has 60 divisors (see below), whose sum is σ = 141306804. Its totient is φ = 21800448.

The previous prime is 57557839. The next prime is 57557873. The reversal of 57557840 is 4875575.

It can be written as a sum of positive squares in 2 ways, for example, as 31629376 + 25928464 = 5624^2 + 5092^2 .

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, 27884 + ... + 29876.

Almost surely, 2^57557840 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 57557840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70653402).

57557840 is an abundant number, since it is smaller than the sum of its proper divisors (83748964).

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

57557840 is a wasteful number, since it uses less digits than its factorization.

57557840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044 (or 2019 counting only the distinct ones).

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 57557840 is about 7586.6883420897. The cubic root of 57557840 is about 386.1015062317.

The spelling of 57557840 in words is "fifty-seven million, five hundred fifty-seven thousand, eight hundred forty".