57664404 has 72 divisors (see below), whose sum is σ = 173846400. Its totient is φ = 15757632.

The previous prime is 57664403. The next prime is 57664469. The reversal of 57664404 is 40446675.

57664404 is a `hidden beast` number, since 5 + 7 + 6 + 644 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57664403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 822 + ... + 10770.

Almost surely, 2^57664404 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 57664404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86923200).

57664404 is an abundant number, since it is smaller than the sum of its proper divisors (116181996).

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

57664404 is a wasteful number, since it uses less digits than its factorization.

57664404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9989 (or 9984 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 57664404 is about 7593.7081850701. The cubic root of 57664404 is about 386.3396386043.

It can be divided in two parts, 576 and 64404, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 57664404 in words is "fifty-seven million, six hundred sixty-four thousand, four hundred four".