22638928 has 40 divisors (see below), whose sum is σ = 48774656. Its totient is φ = 10108800.

The previous prime is 22638919. The next prime is 22638947. The reversal of 22638928 is 82983622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4693 + ... + 8203.

Almost surely, 2^22638928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22638928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24387328).

22638928 is an abundant number, since it is smaller than the sum of its proper divisors (26135728).

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

22638928 is a wasteful number, since it uses less digits than its factorization.

22638928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563 (or 3557 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 22638928 is about 4758.0382512124. The cubic root of 22638928 is about 282.8906668522.

The spelling of 22638928 in words is "twenty-two million, six hundred thirty-eight thousand, nine hundred twenty-eight".