22644879 has 4 divisors (see below), whose sum is σ = 30193176. Its totient is φ = 15096584.

The previous prime is 22644863. The next prime is 22644887. The reversal of 22644879 is 97844622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22644879 - 2⁴ = 22644863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22644879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22644829) 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, 3774144 + ... + 3774149.

It is an arithmetic number, because the mean of its divisors is an integer number (7548294).

Almost surely, 2^22644879 is an apocalyptic number.

22644879 is a deficient number, since it is larger than the sum of its proper divisors (7548297).

22644879 is an equidigital number, since it uses as much as digits as its factorization.

22644879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548296.

The product of its digits is 193536, while the sum is 42.

The square root of 22644879 is about 4758.6635728952. The cubic root of 22644879 is about 282.9154521081.

The spelling of 22644879 in words is "twenty-two million, six hundred forty-four thousand, eight hundred seventy-nine".