56812644 has 48 divisors (see below), whose sum is σ = 168336000. Its totient is φ = 16231968.

The previous prime is 56812643. The next prime is 56812697. The reversal of 56812644 is 44621865.

56812644 is a `hidden beast` number, since 5 + 6 + 8 + 1 + 2 + 644 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 56812599 and 56812608.

It is not an unprimeable number, because it can be changed into a prime (56812643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36819 + ... + 38330.

It is an arithmetic number, because the mean of its divisors is an integer number (3507000).

Almost surely, 2^56812644 is an apocalyptic number.

56812644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

56812644 is an abundant number, since it is smaller than the sum of its proper divisors (111523356).

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

56812644 is a wasteful number, since it uses less digits than its factorization.

56812644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75169 (or 75161 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 56812644 is about 7537.4162681916. The cubic root of 56812644 is about 384.4279896012.

The spelling of 56812644 in words is "fifty-six million, eight hundred twelve thousand, six hundred forty-four".