22640528 has 20 divisors (see below), whose sum is σ = 44937228. Its totient is φ = 11043840.

The previous prime is 22640477. The next prime is 22640539. The reversal of 22640528 is 82504622.

It can be written as a sum of positive squares in 2 ways, for example, as 9909904 + 12730624 = 3148^2 + 3568^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22640528.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16601 + ... + 17912.

Almost surely, 2^22640528 is an apocalyptic number.

It is an amenable number.

22640528 is a deficient number, since it is larger than the sum of its proper divisors (22296700).

22640528 is a wasteful number, since it uses less digits than its factorization.

22640528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34562 (or 34556 counting only the distinct ones).

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

The square root of 22640528 is about 4758.2063847631. The cubic root of 22640528 is about 282.8973311019.

The spelling of 22640528 in words is "twenty-two million, six hundred forty thousand, five hundred twenty-eight".