22688628 has 12 divisors (see below), whose sum is σ = 52940160. Its totient is φ = 7562872.

The previous prime is 22688599. The next prime is 22688647. The reversal of 22688628 is 82688622.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) 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 22688628.

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, 945348 + ... + 945371.

It is an arithmetic number, because the mean of its divisors is an integer number (4411680).

Almost surely, 2^22688628 is an apocalyptic number.

It is an amenable number.

22688628 is an abundant number, since it is smaller than the sum of its proper divisors (30251532).

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

22688628 is a wasteful number, since it uses less digits than its factorization.

22688628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890726 (or 1890724 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 22688628 is about 4763.2581286342. The cubic root of 22688628 is about 283.0975286807.

The spelling of 22688628 in words is "twenty-two million, six hundred eighty-eight thousand, six hundred twenty-eight".