56780018 has 16 divisors (see below), whose sum is σ = 89855520. Its totient is φ = 26834976.

The previous prime is 56779997. The next prime is 56780027. The reversal of 56780018 is 81008765.

It is a happy number.

56780018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 56780018.

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, 18446 + ... + 21302.

It is an arithmetic number, because the mean of its divisors is an integer number (5615970).

Almost surely, 2^56780018 is an apocalyptic number.

56780018 is a deficient number, since it is larger than the sum of its proper divisors (33075502).

56780018 is a wasteful number, since it uses less digits than its factorization.

56780018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 56780018 is about 7535.2516879000. The cubic root of 56780018 is about 384.3543865650.

The spelling of 56780018 in words is "fifty-six million, seven hundred eighty thousand, eighteen".