22044144 has 40 divisors (see below), whose sum is σ = 57152592. Its totient is φ = 7321600.

The previous prime is 22044137. The next prime is 22044157. The reversal of 22044144 is 44144022.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22044144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16294 + ... + 17594.

Almost surely, 2^22044144 is an apocalyptic number.

22044144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22044144 is an abundant number, since it is smaller than the sum of its proper divisors (35108448).

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

22044144 is a wasteful number, since it uses less digits than its factorization.

22044144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 22044144 is about 4695.1191678167. The cubic root of 22044144 is about 280.3912218296.

Adding to 22044144 its reverse (44144022), we get a palindrome (66188166).

The spelling of 22044144 in words is "twenty-two million, forty-four thousand, one hundred forty-four".