22645224 has 128 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 6082560.

The previous prime is 22645223. The next prime is 22645229. The reversal of 22645224 is 42254622.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22645223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25264 + ... + 26144.

It is an arithmetic number, because the mean of its divisors is an integer number (595350).

Almost surely, 2^22645224 is an apocalyptic number.

22645224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22645224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38102400).

22645224 is an abundant number, since it is smaller than the sum of its proper divisors (53559576).

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

22645224 is a wasteful number, since it uses less digits than its factorization.

22645224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 910 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 22645224 is about 4758.6998224305. The cubic root of 22645224 is about 282.9168888617.

Adding to 22645224 its reverse (42254622), we get a palindrome (64899846).

The spelling of 22645224 in words is "twenty-two million, six hundred forty-five thousand, two hundred twenty-four".