57861564 has 12 divisors (see below), whose sum is σ = 135010344. Its totient is φ = 19287184.

The previous prime is 57861533. The next prime is 57861569. The reversal of 57861564 is 46516875.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57861569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2410887 + ... + 2410910.

It is an arithmetic number, because the mean of its divisors is an integer number (11250862).

Almost surely, 2^57861564 is an apocalyptic number.

It is an amenable number.

57861564 is an abundant number, since it is smaller than the sum of its proper divisors (77148780).

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

57861564 is a wasteful number, since it uses less digits than its factorization.

57861564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821804 (or 4821802 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 57861564 is about 7606.6789073813. The cubic root of 57861564 is about 386.7794482082.

The spelling of 57861564 in words is "fifty-seven million, eight hundred sixty-one thousand, five hundred sixty-four".