22028564 has 12 divisors (see below), whose sum is σ = 39182388. Its totient is φ = 10833600.

The previous prime is 22028563. The next prime is 22028593. The reversal of 22028564 is 46582022.

It can be written as a sum of positive squares in 2 ways, for example, as 5152900 + 16875664 = 2270^2 + 4108^2 .

It is a hoax number, since the sum of its digits (29) 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 (22028563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44897 + ... + 45384.

It is an arithmetic number, because the mean of its divisors is an integer number (3265199).

Almost surely, 2^22028564 is an apocalyptic number.

It is an amenable number.

22028564 is a deficient number, since it is larger than the sum of its proper divisors (17153824).

22028564 is a wasteful number, since it uses less digits than its factorization.

22028564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90346 (or 90344 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 22028564 is about 4693.4597047381. The cubic root of 22028564 is about 280.3251494855.

The spelling of 22028564 in words is "twenty-two million, twenty-eight thousand, five hundred sixty-four".