22423644 has 18 divisors (see below), whose sum is σ = 56682080. Its totient is φ = 7474536.

The previous prime is 22423613. The next prime is 22423649. The reversal of 22423644 is 44632422.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22423649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311404 + ... + 311475.

Almost surely, 2^22423644 is an apocalyptic number.

It is an amenable number.

22423644 is an abundant number, since it is smaller than the sum of its proper divisors (34258436).

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

22423644 is a wasteful number, since it uses less digits than its factorization.

22423644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622889 (or 622884 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 22423644 is about 4735.3610210838. The cubic root of 22423644 is about 281.9910967462.

It can be divided in two parts, 2242 and 3644, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 22423644 in words is "twenty-two million, four hundred twenty-three thousand, six hundred forty-four".