22128564 has 24 divisors (see below), whose sum is σ = 52093440. Its totient is φ = 7310464.

The previous prime is 22128551. The next prime is 22128569. The reversal of 22128564 is 46582122.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22128569) 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, 6804 + ... + 9515.

It is an arithmetic number, because the mean of its divisors is an integer number (2170560).

Almost surely, 2^22128564 is an apocalyptic number.

It is an amenable number.

22128564 is an abundant number, since it is smaller than the sum of its proper divisors (29964876).

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

22128564 is a wasteful number, since it uses less digits than its factorization.

22128564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16439 (or 16437 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 22128564 is about 4704.1007642269. The cubic root of 22128564 is about 280.7486935587.

The spelling of 22128564 in words is "twenty-two million, one hundred twenty-eight thousand, five hundred sixty-four".