22743644 has 72 divisors (see below), whose sum is σ = 51391200. Its totient is φ = 8796480.

The previous prime is 22743607. The next prime is 22743649. The reversal of 22743644 is 44634722.

It is a self number, because there is not a number n which added to its sum of digits gives 22743644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22743649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165944 + ... + 166080.

Almost surely, 2^22743644 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 22743644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25695600).

22743644 is an abundant number, since it is smaller than the sum of its proper divisors (28647556).

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

22743644 is a wasteful number, since it uses less digits than its factorization.

22743644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 157 counting only the distinct ones).

The product of its digits is 32256, while the sum is 32.

The square root of 22743644 is about 4769.0296706982. The cubic root of 22743644 is about 283.3261648321.

The spelling of 22743644 in words is "twenty-two million, seven hundred forty-three thousand, six hundred forty-four".