22775644 has 12 divisors (see below), whose sum is σ = 39898264. Its totient is φ = 11376144.

The previous prime is 22775633. The next prime is 22775647. The reversal of 22775644 is 44657722.

It is a super-2 number, since 2×22775644² = 1037459919229472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22775647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2647 + ... + 7249.

Almost surely, 2^22775644 is an apocalyptic number.

It is an amenable number.

22775644 is a deficient number, since it is larger than the sum of its proper divisors (17122620).

22775644 is a wasteful number, since it uses less digits than its factorization.

22775644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844 (or 5842 counting only the distinct ones).

The product of its digits is 94080, while the sum is 37.

The square root of 22775644 is about 4772.3834715999. The cubic root of 22775644 is about 283.4589812573.

It can be divided in two parts, 2277 and 5644, that added together give a square (7921 = 89²).

The spelling of 22775644 in words is "twenty-two million, seven hundred seventy-five thousand, six hundred forty-four".