22742644 has 6 divisors (see below), whose sum is σ = 39799634. Its totient is φ = 11371320.

The previous prime is 22742633. The next prime is 22742663. The reversal of 22742644 is 44624722.

It can be written as a sum of positive squares in only one way, i.e., 15920100 + 6822544 = 3990^2 + 2612^2 .

It is a super-2 number, since 2×22742644² = 1034455712221472, which contains 22 as substring.

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, 2842827 + ... + 2842834.

Almost surely, 2^22742644 is an apocalyptic number.

It is an amenable number.

22742644 is a deficient number, since it is larger than the sum of its proper divisors (17056990).

22742644 is a wasteful number, since it uses less digits than its factorization.

22742644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685665 (or 5685663 counting only the distinct ones).

The product of its digits is 21504, while the sum is 31.

The square root of 22742644 is about 4768.9248264153. The cubic root of 22742644 is about 283.3220123120.

The spelling of 22742644 in words is "twenty-two million, seven hundred forty-two thousand, six hundred forty-four".