564428028 has 24 divisors (see below), whose sum is σ = 1317636432. Its totient is φ = 188051584.

The previous prime is 564427973. The next prime is 564428069. The reversal of 564428028 is 820824465.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17326 + ... + 37802.

It is an arithmetic number, because the mean of its divisors is an integer number (54901518).

Almost surely, 2^564428028 is an apocalyptic number.

It is an amenable number.

564428028 is an abundant number, since it is smaller than the sum of its proper divisors (753208404).

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

564428028 is a wasteful number, since it uses less digits than its factorization.

564428028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22781 (or 22779 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 564428028 is about 23757.6940800238. The cubic root of 564428028 is about 826.4238786522.

The spelling of 564428028 in words is "five hundred sixty-four million, four hundred twenty-eight thousand, twenty-eight".