57807840 has 96 divisors (see below), whose sum is σ = 184415616. Its totient is φ = 15219200.

The previous prime is 57807821. The next prime is 57807847. The reversal of 57807840 is 4870875.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57807847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39115 + ... + 40565.

It is an arithmetic number, because the mean of its divisors is an integer number (1920996).

Almost surely, 2^57807840 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 57807840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92207808).

57807840 is an abundant number, since it is smaller than the sum of its proper divisors (126607776).

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

57807840 is a wasteful number, since it uses less digits than its factorization.

57807840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1544 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 57807840 is about 7603.1467169850. The cubic root of 57807840 is about 386.6597039306.

The spelling of 57807840 in words is "fifty-seven million, eight hundred seven thousand, eight hundred forty".