22645264 has 40 divisors (see below), whose sum is σ = 46569440. Its totient is φ = 10637568.

The previous prime is 22645247. The next prime is 22645267. The reversal of 22645264 is 46254622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22645267) 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, 49324 + ... + 49780.

It is an arithmetic number, because the mean of its divisors is an integer number (1164236).

Almost surely, 2^22645264 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 22645264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23284720).

22645264 is an abundant number, since it is smaller than the sum of its proper divisors (23924176).

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

22645264 is a wasteful number, since it uses less digits than its factorization.

22645264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 641 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 22645264 is about 4758.7040252573. The cubic root of 22645264 is about 282.9170554409.

Adding to 22645264 its reverse (46254622), we get a palindrome (68899886).

The spelling of 22645264 in words is "twenty-two million, six hundred forty-five thousand, two hundred sixty-four".