56643884 has 12 divisors (see below), whose sum is σ = 108138408. Its totient is φ = 25747200.

The previous prime is 56643863. The next prime is 56643887. The reversal of 56643884 is 48834665.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1287361 = 56643884 / (5 + 6 + 6 + 4 + 3 + 8 + 8 + 4).

It is not an unprimeable number, because it can be changed into a prime (56643887) 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, 643637 + ... + 643724.

It is an arithmetic number, because the mean of its divisors is an integer number (9011534).

Almost surely, 2^56643884 is an apocalyptic number.

It is an amenable number.

56643884 is a deficient number, since it is larger than the sum of its proper divisors (51494524).

56643884 is a wasteful number, since it uses less digits than its factorization.

56643884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287376 (or 1287374 counting only the distinct ones).

The product of its digits is 552960, while the sum is 44.

The square root of 56643884 is about 7526.2131248059. The cubic root of 56643884 is about 384.0469687195.

The spelling of 56643884 in words is "fifty-six million, six hundred forty-three thousand, eight hundred eighty-four".