57399424 has 32 divisors (see below), whose sum is σ = 116521740. Its totient is φ = 28154880.

The previous prime is 57399409. The next prime is 57399427. The reversal of 57399424 is 42499375.

It can be written as a sum of positive squares in 2 ways, for example, as 52417600 + 4981824 = 7240^2 + 2232^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (57399427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2554 + ... + 11014.

Almost surely, 2^57399424 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 57399424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58260870).

57399424 is an abundant number, since it is smaller than the sum of its proper divisors (59122316).

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

57399424 is an equidigital number, since it uses as much as digits as its factorization.

57399424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528 (or 8516 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 57399424 is about 7576.2407564702. The cubic root of 57399424 is about 385.7469593590.

The spelling of 57399424 in words is "fifty-seven million, three hundred ninety-nine thousand, four hundred twenty-four".