56638947 has 8 divisors (see below), whose sum is σ = 75620880. Its totient is φ = 37708160.

The previous prime is 56638909. The next prime is 56638957. The reversal of 56638947 is 74983665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56638947 - 2⁸ = 56638691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56638896 and 56638905.

It is not an unprimeable number, because it can be changed into a prime (56638957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10122 + ... + 14687.

It is an arithmetic number, because the mean of its divisors is an integer number (9452610).

Almost surely, 2^56638947 is an apocalyptic number.

56638947 is a deficient number, since it is larger than the sum of its proper divisors (18981933).

56638947 is a wasteful number, since it uses less digits than its factorization.

56638947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25573.

The product of its digits is 1088640, while the sum is 48.

The square root of 56638947 is about 7525.8851306674. The cubic root of 56638947 is about 384.0358107336.

The spelling of 56638947 in words is "fifty-six million, six hundred thirty-eight thousand, nine hundred forty-seven".