57523820 has 72 divisors (see below), whose sum is σ = 130258800. Its totient is φ = 21306880.

The previous prime is 57523799. The next prime is 57523831. The reversal of 57523820 is 2832575.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 974951 + ... + 975009.

It is an arithmetic number, because the mean of its divisors is an integer number (1809150).

Almost surely, 2^57523820 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 57523820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65129400).

57523820 is an abundant number, since it is smaller than the sum of its proper divisors (72734980).

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

57523820 is a wasteful number, since it uses less digits than its factorization.

57523820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 57523820 is about 7584.4459257087. The cubic root of 57523820 is about 386.0254218270.

The spelling of 57523820 in words is "fifty-seven million, five hundred twenty-three thousand, eight hundred twenty".