22438664 has 8 divisors (see below), whose sum is σ = 42072510. Its totient is φ = 11219328.

The previous prime is 22438609. The next prime is 22438673. The reversal of 22438664 is 46683422.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 6100900 = 4042^2 + 2470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402409 + ... + 1402424.

Almost surely, 2^22438664 is an apocalyptic number.

It is an amenable number.

22438664 is a deficient number, since it is larger than the sum of its proper divisors (19633846).

22438664 is a wasteful number, since it uses less digits than its factorization.

22438664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804839 (or 2804835 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 22438664 is about 4736.9466959213. The cubic root of 22438664 is about 282.0540446022.

The spelling of 22438664 in words is "twenty-two million, four hundred thirty-eight thousand, six hundred sixty-four".