22644164 has 6 divisors (see below), whose sum is σ = 39627294. Its totient is φ = 11322080.

The previous prime is 22644163. The next prime is 22644173. The reversal of 22644164 is 46144622.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 6708100 = 3992^2 + 2590^2 .

It is not an unprimeable number, because it can be changed into a prime (22644163) by changing a digit.

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 as a sum of consecutive naturals, namely, 2830517 + ... + 2830524.

It is an arithmetic number, because the mean of its divisors is an integer number (6604549).

Almost surely, 2^22644164 is an apocalyptic number.

It is an amenable number.

22644164 is a deficient number, since it is larger than the sum of its proper divisors (16983130).

22644164 is a wasteful number, since it uses less digits than its factorization.

22644164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5661045 (or 5661043 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 22644164 is about 4758.5884461676. The cubic root of 22644164 is about 282.9124744418.

Adding to 22644164 its reverse (46144622), we get a palindrome (68788786).

The spelling of 22644164 in words is "twenty-two million, six hundred forty-four thousand, one hundred sixty-four".