56236644 has 18 divisors (see below), whose sum is σ = 142153830. Its totient is φ = 18745536.

The previous prime is 56236639. The next prime is 56236667. The reversal of 56236644 is 44663265.

56236644 is a `hidden beast` number, since 5 + 6 + 2 + 3 + 6 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54022500 + 2214144 = 7350^2 + 1488^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1562129 = 56236644 / (5 + 6 + 2 + 3 + 6 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 56236599 and 56236608.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 781029 + ... + 781100.

It is an arithmetic number, because the mean of its divisors is an integer number (7897435).

Almost surely, 2^56236644 is an apocalyptic number.

It is an amenable number.

56236644 is an abundant number, since it is smaller than the sum of its proper divisors (85917186).

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

56236644 is a wasteful number, since it uses less digits than its factorization.

56236644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562139 (or 1562134 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 56236644 is about 7499.1095471396. The cubic root of 56236644 is about 383.1243883777.

The spelling of 56236644 in words is "fifty-six million, two hundred thirty-six thousand, six hundred forty-four".