57845720 has 64 divisors (see below), whose sum is σ = 137635200. Its totient is φ = 21844480.

The previous prime is 57845719. The next prime is 57845741. The reversal of 57845720 is 2754875.

It is a super-2 number, since 2×57845720² = 6692254644636800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53990 + ... + 55050.

It is an arithmetic number, because the mean of its divisors is an integer number (2150550).

Almost surely, 2^57845720 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 57845720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68817600).

57845720 is an abundant number, since it is smaller than the sum of its proper divisors (79789480).

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

57845720 is a wasteful number, since it uses less digits than its factorization.

57845720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 57845720 is about 7605.6373828891. The cubic root of 57845720 is about 386.7441415637.

The spelling of 57845720 in words is "fifty-seven million, eight hundred forty-five thousand, seven hundred twenty".