56688747 has 8 divisors (see below), whose sum is σ = 77011344. Its totient is φ = 37079328.

The previous prime is 56688733. The next prime is 56688757. The reversal of 56688747 is 74788665.

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

It is not a de Polignac number, because 56688747 - 2⁶ = 56688683 is a prime.

It is a super-2 number, since 2×56688747² = 6427228072860018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56688747.

It is not an unprimeable number, because it can be changed into a prime (56688757) 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, 178108 + ... + 178425.

It is an arithmetic number, because the mean of its divisors is an integer number (9626418).

Almost surely, 2^56688747 is an apocalyptic number.

56688747 is a deficient number, since it is larger than the sum of its proper divisors (20322597).

56688747 is a wasteful number, since it uses less digits than its factorization.

56688747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356589.

The product of its digits is 2257920, while the sum is 51.

The square root of 56688747 is about 7529.1929846432. The cubic root of 56688747 is about 384.1483327224.

The spelling of 56688747 in words is "fifty-six million, six hundred eighty-eight thousand, seven hundred forty-seven".