22426624 has 66 divisors (see below), whose sum is σ = 49549682. Its totient is φ = 10137600.

The previous prime is 22426619. The next prime is 22426637. The reversal of 22426624 is 42662422.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 10036224 = 3520^2 + 3168^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22426592 and 22426601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123814 + ... + 123994.

Almost surely, 2^22426624 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 22426624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24774841).

22426624 is an abundant number, since it is smaller than the sum of its proper divisors (27123058).

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

22426624 is a wasteful number, since it uses less digits than its factorization.

22426624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 194 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 22426624 is about 4735.6756645699. The cubic root of 22426624 is about 282.0035879697.

The spelling of 22426624 in words is "twenty-two million, four hundred twenty-six thousand, six hundred twenty-four".