22189664 has 96 divisors (see below), whose sum is σ = 53706240. Its totient is φ = 8819712.

The previous prime is 22189649. The next prime is 22189667. The reversal of 22189664 is 46698122.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22189667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303932 + ... + 304004.

It is an arithmetic number, because the mean of its divisors is an integer number (559440).

Almost surely, 2^22189664 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 22189664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26853120).

22189664 is an abundant number, since it is smaller than the sum of its proper divisors (31516576).

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

22189664 is a wasteful number, since it uses less digits than its factorization.

22189664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 164 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 22189664 is about 4710.5906211430. The cubic root of 22189664 is about 281.0068513166.

The spelling of 22189664 in words is "twenty-two million, one hundred eighty-nine thousand, six hundred sixty-four".