22644224 has 40 divisors (see below), whose sum is σ = 46255968. Its totient is φ = 11069440.

The previous prime is 22644217. The next prime is 22644247. The reversal of 22644224 is 42244622.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22644193 and 22644202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23594 + ... + 24534.

Almost surely, 2^22644224 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 22644224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23127984).

22644224 is an abundant number, since it is smaller than the sum of its proper divisors (23611744).

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

22644224 is an frugal number, since it uses more digits than its factorization.

22644224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 990 counting only the distinct ones).

The product of its digits is 6144, while the sum is 26.

The square root of 22644224 is about 4758.5947505540. The cubic root of 22644224 is about 282.9127243183.

Adding to 22644224 its reverse (42244622), we get a palindrome (64888846).

The spelling of 22644224 in words is "twenty-two million, six hundred forty-four thousand, two hundred twenty-four".