57501440 has 72 divisors (see below), whose sum is σ = 139073760. Its totient is φ = 22777856.

The previous prime is 57501439. The next prime is 57501469. The reversal of 57501440 is 4410575.

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, 213626 + ... + 213894.

It is an arithmetic number, because the mean of its divisors is an integer number (1931580).

Almost surely, 2^57501440 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 57501440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69536880).

57501440 is an abundant number, since it is smaller than the sum of its proper divisors (81572320).

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

57501440 is a wasteful number, since it uses less digits than its factorization.

57501440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 57501440 is about 7582.9703942453. The cubic root of 57501440 is about 385.9753534694.

The spelling of 57501440 in words is "fifty-seven million, five hundred one thousand, four hundred forty".