22022644 has 24 divisors (see below), whose sum is σ = 44145920. Its totient is φ = 9416736.

The previous prime is 22022641. The next prime is 22022677. The reversal of 22022644 is 44622022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20677 + ... + 21715.

Almost surely, 2^22022644 is an apocalyptic number.

It is an amenable number.

22022644 is an abundant number, since it is smaller than the sum of its proper divisors (22123276).

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

22022644 is a wasteful number, since it uses less digits than its factorization.

22022644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 22022644 is about 4692.8289975238. The cubic root of 22022644 is about 280.3000355233.

Adding to 22022644 its reverse (44622022), we get a palindrome (66644666).

The spelling of 22022644 in words is "twenty-two million, twenty-two thousand, six hundred forty-four".