22423444 has 12 divisors (see below), whose sum is σ = 39280500. Its totient is φ = 11200448.

The previous prime is 22423441. The next prime is 22423463. The reversal of 22423444 is 44432422.

It can be written as a sum of positive squares in 2 ways, for example, as 7907344 + 14516100 = 2812^2 + 3810^2 .

It is a super-2 number, since 2×22423444² = 1005621681642272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22423441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2982 + ... + 7330.

It is an arithmetic number, because the mean of its divisors is an integer number (3273375).

Almost surely, 2^22423444 is an apocalyptic number.

It is an amenable number.

22423444 is a deficient number, since it is larger than the sum of its proper divisors (16857056).

22423444 is a wasteful number, since it uses less digits than its factorization.

22423444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5642 (or 5640 counting only the distinct ones).

The product of its digits is 6144, while the sum is 25.

The square root of 22423444 is about 4735.3399033227. The cubic root of 22423444 is about 281.9902583694.

Adding to 22423444 its reverse (44432422), we get a palindrome (66855866).

The spelling of 22423444 in words is "twenty-two million, four hundred twenty-three thousand, four hundred forty-four".