57403872 has 72 divisors (see below), whose sum is σ = 167685336. Its totient is φ = 18614016.

The previous prime is 57403861. The next prime is 57403877. The reversal of 57403872 is 27830475.

57403872 is a `hidden beast` number, since 574 + 0 + 3 + 87 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57403877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7963 + ... + 13349.

It is an arithmetic number, because the mean of its divisors is an integer number (2328963).

Almost surely, 2^57403872 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 57403872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83842668).

57403872 is an abundant number, since it is smaller than the sum of its proper divisors (110281464).

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

57403872 is a wasteful number, since it uses less digits than its factorization.

57403872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440 (or 5429 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 57403872 is about 7576.5343000609. The cubic root of 57403872 is about 385.7569232114.

The spelling of 57403872 in words is "fifty-seven million, four hundred three thousand, eight hundred seventy-two".