22764644 has 12 divisors (see below), whose sum is σ = 45529344. Its totient is φ = 9756264.

The previous prime is 22764611. The next prime is 22764647. The reversal of 22764644 is 44646722.

22764644 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (22764647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406484 + ... + 406539.

It is an arithmetic number, because the mean of its divisors is an integer number (3794112).

Almost surely, 2^22764644 is an apocalyptic number.

It is an amenable number.

22764644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22764644 is a wasteful number, since it uses less digits than its factorization.

22764644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813034 (or 813032 counting only the distinct ones).

The product of its digits is 64512, while the sum is 35.

The square root of 22764644 is about 4771.2308684447. The cubic root of 22764644 is about 283.4133396514.

The spelling of 22764644 in words is "twenty-two million, seven hundred sixty-four thousand, six hundred forty-four".