57581040 has 160 divisors (see below), whose sum is σ = 206343936. Its totient is φ = 13127680.

The previous prime is 57581033. The next prime is 57581081. The reversal of 57581040 is 4018575.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 57580989 and 57581007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44239 + ... + 45521.

Almost surely, 2^57581040 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 57581040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103171968).

57581040 is an abundant number, since it is smaller than the sum of its proper divisors (148762896).

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

57581040 is a wasteful number, since it uses less digits than its factorization.

57581040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 57581040 is about 7588.2171819209. The cubic root of 57581040 is about 386.1533749357.

The spelling of 57581040 in words is "fifty-seven million, five hundred eighty-one thousand, forty".