56981838 has 16 divisors (see below), whose sum is σ = 114057936. Its totient is φ = 18978240.

The previous prime is 56981791. The next prime is 56981849. The reversal of 56981838 is 83818965.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5778 + ... + 12138.

It is an arithmetic number, because the mean of its divisors is an integer number (7128621).

Almost surely, 2^56981838 is an apocalyptic number.

56981838 is an abundant number, since it is smaller than the sum of its proper divisors (57076098).

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

56981838 is a wasteful number, since it uses less digits than its factorization.

56981838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7859.

The product of its digits is 414720, while the sum is 48.

The square root of 56981838 is about 7548.6315316089. The cubic root of 56981838 is about 384.8092336525.

The spelling of 56981838 in words is "fifty-six million, nine hundred eighty-one thousand, eight hundred thirty-eight".