57866816 has 56 divisors (see below), whose sum is σ = 134819136. Its totient is φ = 24122880.

The previous prime is 57866813. The next prime is 57866819. The reversal of 57866816 is 61866875.

57866816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (57866813) and next prime (57866819).

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (57866813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14831 + ... + 18321.

Almost surely, 2^57866816 is an apocalyptic number.

57866816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57866816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67409568).

57866816 is an abundant number, since it is smaller than the sum of its proper divisors (76952320).

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

57866816 is a wasteful number, since it uses less digits than its factorization.

57866816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547 (or 3537 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 57866816 is about 7607.0241224805. The cubic root of 57866816 is about 386.7911503012.

The spelling of 57866816 in words is "fifty-seven million, eight hundred sixty-six thousand, eight hundred sixteen".