22243664 has 20 divisors (see below), whose sum is σ = 43322004. Its totient is φ = 11063808.

The previous prime is 22243657. The next prime is 22243673. The reversal of 22243664 is 46634222.

It can be written as a sum of positive squares in 2 ways, for example, as 22090000 + 153664 = 4700^2 + 392^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 377 + ... + 6680.

Almost surely, 2^22243664 is an apocalyptic number.

It is an amenable number.

22243664 is a deficient number, since it is larger than the sum of its proper divisors (21078340).

22243664 is a wasteful number, since it uses less digits than its factorization.

22243664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262 (or 7256 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 22243664 is about 4716.3189035518. The cubic root of 22243664 is about 281.2346161791.

Adding to 22243664 its reverse (46634222), we get a palindrome (68877886).

The spelling of 22243664 in words is "twenty-two million, two hundred forty-three thousand, six hundred sixty-four".