57866388 has 12 divisors (see below), whose sum is σ = 135021600. Its totient is φ = 19288792.

The previous prime is 57866387. The next prime is 57866399. The reversal of 57866388 is 88366875.

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

It is a self number, because there is not a number n which added to its sum of digits gives 57866388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57866383) 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, 2411088 + ... + 2411111.

It is an arithmetic number, because the mean of its divisors is an integer number (11251800).

Almost surely, 2^57866388 is an apocalyptic number.

It is an amenable number.

57866388 is an abundant number, since it is smaller than the sum of its proper divisors (77155212).

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

57866388 is a wasteful number, since it uses less digits than its factorization.

57866388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822206 (or 4822204 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 57866388 is about 7606.9959905340. The cubic root of 57866388 is about 386.7901966918.

It can be divided in two parts, 578 and 66388, that added together give a palindrome (66966).

The spelling of 57866388 in words is "fifty-seven million, eight hundred sixty-six thousand, three hundred eighty-eight".