57539240 has 64 divisors (see below), whose sum is σ = 142067520. Its totient is φ = 20800000.

The previous prime is 57539231. The next prime is 57539243. The reversal of 57539240 is 4293575.

It is a self number, because there is not a number n which added to its sum of digits gives 57539240.

It is not an unprimeable number, because it can be changed into a prime (57539243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110180 + ... + 110700.

It is an arithmetic number, because the mean of its divisors is an integer number (2219805).

Almost surely, 2^57539240 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 57539240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71033760).

57539240 is an abundant number, since it is smaller than the sum of its proper divisors (84528280).

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

57539240 is a wasteful number, since it uses less digits than its factorization.

57539240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 57539240 is about 7585.4624117452. The cubic root of 57539240 is about 386.0599117722.

The spelling of 57539240 in words is "fifty-seven million, five hundred thirty-nine thousand, two hundred forty".