22642644 has 12 divisors (see below), whose sum is σ = 52832864. Its totient is φ = 7547544.

The previous prime is 22642637. The next prime is 22642667. The reversal of 22642644 is 44624622.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 943432 + ... + 943455.

Almost surely, 2^22642644 is an apocalyptic number.

It is an amenable number.

22642644 is an abundant number, since it is smaller than the sum of its proper divisors (30190220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22642644 is a wasteful number, since it uses less digits than its factorization.

22642644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886894 (or 1886892 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 22642644 is about 4758.4287322603. The cubic root of 22642644 is about 282.9061440899.

The spelling of 22642644 in words is "twenty-two million, six hundred forty-two thousand, six hundred forty-four".