56688394 has 12 divisors (see below), whose sum is σ = 98915634. Its totient is φ = 24294984.

The previous prime is 56688389. The next prime is 56688413. The reversal of 56688394 is 49388665.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40487769 + 16200625 = 6363^2 + 4025^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

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, 289129 + ... + 289324.

Almost surely, 2^56688394 is an apocalyptic number.

56688394 is a deficient number, since it is larger than the sum of its proper divisors (42227240).

56688394 is a wasteful number, since it uses less digits than its factorization.

56688394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578469 (or 578462 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 56688394 is about 7529.1695425193. The cubic root of 56688394 is about 384.1475353587.

The spelling of 56688394 in words is "fifty-six million, six hundred eighty-eight thousand, three hundred ninety-four".