56398657 has 24 divisors (see below), whose sum is σ = 68372640. Its totient is φ = 46347840.

The previous prime is 56398633. The next prime is 56398679. The reversal of 56398657 is 75689365.

It is not a de Polignac number, because 56398657 - 2²³ = 48010049 is a prime.

It is a super-2 number, since 2×56398657² = 6361617022807298, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 56398657.

It is not an unprimeable number, because it can be changed into a prime (56398607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134394 + ... + 134812.

It is an arithmetic number, because the mean of its divisors is an integer number (2848860).

Almost surely, 2^56398657 is an apocalyptic number.

It is an amenable number.

56398657 is a deficient number, since it is larger than the sum of its proper divisors (11973983).

56398657 is a wasteful number, since it uses less digits than its factorization.

56398657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 534 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 49.

The square root of 56398657 is about 7509.9039274814. The cubic root of 56398657 is about 383.4919519159.

The spelling of 56398657 in words is "fifty-six million, three hundred ninety-eight thousand, six hundred fifty-seven".