56447864 has 16 divisors (see below), whose sum is σ = 115461720. Its totient is φ = 25658080.

The previous prime is 56447861. The next prime is 56447921. The reversal of 56447864 is 46874465.

It is a super-2 number, since 2×56447864² = 6372722700324992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56447861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320639 + ... + 320814.

Almost surely, 2^56447864 is an apocalyptic number.

It is an amenable number.

56447864 is an abundant number, since it is smaller than the sum of its proper divisors (59013856).

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

56447864 is a wasteful number, since it uses less digits than its factorization.

56447864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641470 (or 641466 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 56447864 is about 7513.1793536425. The cubic root of 56447864 is about 383.6034498608.

The spelling of 56447864 in words is "fifty-six million, four hundred forty-seven thousand, eight hundred sixty-four".