56983881 has 16 divisors (see below), whose sum is σ = 82162944. Its totient is φ = 34992384.

The previous prime is 56983879. The next prime is 56983909. The reversal of 56983881 is 18838965.

It is not a de Polignac number, because 56983881 - 2¹ = 56983879 is a prime.

It is a super-2 number, since 2×56983881² = 6494325387644322, 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 56983881.

It is not an unprimeable number, because it can be changed into a prime (56983081) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9490 + ... + 14283.

It is an arithmetic number, because the mean of its divisors is an integer number (5135184).

Almost surely, 2^56983881 is an apocalyptic number.

56983881 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56983881 is a deficient number, since it is larger than the sum of its proper divisors (25179063).

56983881 is a wasteful number, since it uses less digits than its factorization.

56983881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23840.

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

The square root of 56983881 is about 7548.7668529370. The cubic root of 56983881 is about 384.8138325206.

The spelling of 56983881 in words is "fifty-six million, nine hundred eighty-three thousand, eight hundred eighty-one".