22643408 has 40 divisors (see below), whose sum is σ = 47044608. Its totient is φ = 10530432.

The previous prime is 22643407. The next prime is 22643419. The reversal of 22643408 is 80434622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12785 + ... + 14447.

Almost surely, 2^22643408 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 22643408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23522304).

22643408 is an abundant number, since it is smaller than the sum of its proper divisors (24401200).

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

22643408 is a wasteful number, since it uses less digits than its factorization.

22643408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 22643408 is about 4758.5090101838. The cubic root of 22643408 is about 282.9093259601.

It can be divided in two parts, 226 and 43408, that added together give a palindrome (43634).

The spelling of 22643408 in words is "twenty-two million, six hundred forty-three thousand, four hundred eight".