56381816 has 32 divisors (see below), whose sum is σ = 113184000. Its totient is φ = 26250336.

The previous prime is 56381791. The next prime is 56381833. The reversal of 56381816 is 61818365.

It is a happy number.

56381816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

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

It is a self number, because there is not a number n which added to its sum of digits gives 56381816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5825 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (3537000).

Almost surely, 2^56381816 is an apocalyptic number.

It is an amenable number.

56381816 is an abundant number, since it is smaller than the sum of its proper divisors (56802184).

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

56381816 is a wasteful number, since it uses less digits than its factorization.

56381816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371 (or 6367 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 56381816 is about 7508.7825910729. The cubic root of 56381816 is about 383.4537770653.

The spelling of 56381816 in words is "fifty-six million, three hundred eighty-one thousand, eight hundred sixteen".