22304656 has 60 divisors (see below), whose sum is σ = 48832812. Its totient is φ = 9856000.

The previous prime is 22304647. The next prime is 22304669. The reversal of 22304656 is 65640322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6969600 + 15335056 = 2640^2 + 3916^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79236 + ... + 79516.

Almost surely, 2^22304656 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 22304656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24416406).

22304656 is an abundant number, since it is smaller than the sum of its proper divisors (26528156).

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

22304656 is a wasteful number, since it uses less digits than its factorization.

22304656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 22304656 is about 4722.7805369295. The cubic root of 22304656 is about 281.4914295003.

Adding to 22304656 its reverse (65640322), we get a palindrome (87944978).

It can be divided in two parts, 2230 and 4656, that added together give a palindrome (6886).

The spelling of 22304656 in words is "twenty-two million, three hundred four thousand, six hundred fifty-six".