22064644 has 12 divisors (see below), whose sum is σ = 44129344. Its totient is φ = 9456264.

The previous prime is 22064639. The next prime is 22064671. The reversal of 22064644 is 44646022.

22064644 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 788023 = 22064644 / (2 + 2 + 0 + 6 + 4 + 6 + 4 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393984 + ... + 394039.

Almost surely, 2^22064644 is an apocalyptic number.

It is an amenable number.

22064644 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.

22064644 is a wasteful number, since it uses less digits than its factorization.

22064644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788034 (or 788032 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 22064644 is about 4697.3017786810. The cubic root of 22064644 is about 280.4781117110.

The spelling of 22064644 in words is "twenty-two million, sixty-four thousand, six hundred forty-four".