56428889 has 8 divisors (see below), whose sum is σ = 61635168. Its totient is φ = 51235360.

The previous prime is 56428873. The next prime is 56428891. The reversal of 56428889 is 98882465.

56428889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 56428889 - 2⁴ = 56428873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56428829) by changing a digit.

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, 7709 + ... + 13125.

It is an arithmetic number, because the mean of its divisors is an integer number (7704396).

Almost surely, 2^56428889 is an apocalyptic number.

It is an amenable number.

56428889 is a deficient number, since it is larger than the sum of its proper divisors (5206279).

56428889 is a wasteful number, since it uses less digits than its factorization.

56428889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375.

The product of its digits is 1105920, while the sum is 50.

The square root of 56428889 is about 7511.9164665217. The cubic root of 56428889 is about 383.5604621627.

The spelling of 56428889 in words is "fifty-six million, four hundred twenty-eight thousand, eight hundred eighty-nine".