56428818 has 8 divisors (see below), whose sum is σ = 112857648. Its totient is φ = 18809604.

The previous prime is 56428789. The next prime is 56428829. The reversal of 56428818 is 81882465.

It is a sphenic number, since it is the product of 3 distinct primes.

56428818 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56428818.

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 3 ways as a sum of consecutive naturals, for example, 4702396 + ... + 4702407.

It is an arithmetic number, because the mean of its divisors is an integer number (14107206).

Almost surely, 2^56428818 is an apocalyptic number.

56428818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56428818 is a wasteful number, since it uses less digits than its factorization.

56428818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404808.

The product of its digits is 122880, while the sum is 42.

The square root of 56428818 is about 7511.9117406956. The cubic root of 56428818 is about 383.5603012947.

The spelling of 56428818 in words is "fifty-six million, four hundred twenty-eight thousand, eight hundred eighteen".