57499920 has 60 divisors (see below), whose sum is σ = 193106316. Its totient is φ = 15333120.

The previous prime is 57499907. The next prime is 57499921. The reversal of 57499920 is 2999475.

It can be written as a sum of positive squares in 2 ways, for example, as 40755456 + 16744464 = 6384^2 + 4092^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57499921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39211 + ... + 40650.

Almost surely, 2^57499920 is an apocalyptic number.

It is an amenable number.

57499920 is an abundant number, since it is smaller than the sum of its proper divisors (135606396).

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

57499920 is a wasteful number, since it uses less digits than its factorization.

57499920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79880 (or 79871 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 57499920 is about 7582.8701690059. The cubic root of 57499920 is about 385.9719524664.

The spelling of 57499920 in words is "fifty-seven million, four hundred ninety-nine thousand, nine hundred twenty".