22685628 has 72 divisors (see below), whose sum is σ = 63144144. Its totient is φ = 6316800.

The previous prime is 22685609. The next prime is 22685651. The reversal of 22685628 is 82658622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23638 + ... + 24578.

It is an arithmetic number, because the mean of its divisors is an integer number (877002).

Almost surely, 2^22685628 is an apocalyptic number.

22685628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22685628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31572072).

22685628 is an abundant number, since it is smaller than the sum of its proper divisors (40458516).

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

22685628 is a wasteful number, since it uses less digits than its factorization.

22685628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 994 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 22685628 is about 4762.9432077236. The cubic root of 22685628 is about 283.0850506231.

The spelling of 22685628 in words is "twenty-two million, six hundred eighty-five thousand, six hundred twenty-eight".