22557644 has 6 divisors (see below), whose sum is σ = 39475884. Its totient is φ = 11278820.

The previous prime is 22557637. The next prime is 22557649. The reversal of 22557644 is 44675522.

It is not an unprimeable number, because it can be changed into a prime (22557649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2819702 + ... + 2819709.

It is an arithmetic number, because the mean of its divisors is an integer number (6579314).

Almost surely, 2^22557644 is an apocalyptic number.

It is an amenable number.

22557644 is a deficient number, since it is larger than the sum of its proper divisors (16918240).

22557644 is a wasteful number, since it uses less digits than its factorization.

22557644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639415 (or 5639413 counting only the distinct ones).

The product of its digits is 67200, while the sum is 35.

The square root of 22557644 is about 4749.4888145989. The cubic root of 22557644 is about 282.5516923184.

The spelling of 22557644 in words is "twenty-two million, five hundred fifty-seven thousand, six hundred forty-four".