56891844 has 72 divisors (see below), whose sum is σ = 148016960. Its totient is φ = 18418752.

The previous prime is 56891839. The next prime is 56891869. The reversal of 56891844 is 44819865.

56891844 is a `hidden beast` number, since 568 + 9 + 1 + 84 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 56891844.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248322 + ... + 248550.

Almost surely, 2^56891844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56891844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74008480).

56891844 is an abundant number, since it is smaller than the sum of its proper divisors (91125116).

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

56891844 is a wasteful number, since it uses less digits than its factorization.

56891844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 404 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 56891844 is about 7542.6682281537. The cubic root of 56891844 is about 384.6065446871.

The spelling of 56891844 in words is "fifty-six million, eight hundred ninety-one thousand, eight hundred forty-four".