22644589 has 4 divisors (see below), whose sum is σ = 24703200. Its totient is φ = 20585980.

The previous prime is 22644577. The next prime is 22644619. The reversal of 22644589 is 98544622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22644589 - 2⁹ = 22644077 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22644509) 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, 1029289 + ... + 1029310.

It is an arithmetic number, because the mean of its divisors is an integer number (6175800).

Almost surely, 2^22644589 is an apocalyptic number.

It is an amenable number.

22644589 is a deficient number, since it is larger than the sum of its proper divisors (2058611).

22644589 is a wasteful number, since it uses less digits than its factorization.

22644589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058610.

The product of its digits is 138240, while the sum is 40.

The square root of 22644589 is about 4758.6331020578. The cubic root of 22644589 is about 282.9142443909.

The spelling of 22644589 in words is "twenty-two million, six hundred forty-four thousand, five hundred eighty-nine".