22508628 has 24 divisors (see below), whose sum is σ = 54804288. Its totient is φ = 7176576.

The previous prime is 22508599. The next prime is 22508641. The reversal of 22508628 is 82680522.

22508628 is nontrivially palindromic in base 14.

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 7 ways as a sum of consecutive naturals, for example, 40501 + ... + 41052.

It is an arithmetic number, because the mean of its divisors is an integer number (2283512).

Almost surely, 2^22508628 is an apocalyptic number.

It is an amenable number.

22508628 is an abundant number, since it is smaller than the sum of its proper divisors (32295660).

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

22508628 is a wasteful number, since it uses less digits than its factorization.

22508628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81583 (or 81581 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 22508628 is about 4744.3258741364. The cubic root of 22508628 is about 282.3468896477.

It can be divided in two parts, 2250 and 8628, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 22508628 in words is "twenty-two million, five hundred eight thousand, six hundred twenty-eight".