22490979 has 16 divisors (see below), whose sum is σ = 35454720. Its totient is φ = 12408480.

The previous prime is 22490969. The next prime is 22490981. The reversal of 22490979 is 97909422.

It is not a de Polignac number, because 22490979 - 2⁸ = 22490723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22490979.

It is not an unprimeable number, because it can be changed into a prime (22490939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17857 + ... + 19074.

It is an arithmetic number, because the mean of its divisors is an integer number (2215920).

Almost surely, 2^22490979 is an apocalyptic number.

22490979 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

22490979 is a deficient number, since it is larger than the sum of its proper divisors (12963741).

22490979 is a wasteful number, since it uses less digits than its factorization.

22490979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36970.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 22490979 is about 4742.4654980295. The cubic root of 22490979 is about 282.2730743497.

The spelling of 22490979 in words is "twenty-two million, four hundred ninety thousand, nine hundred seventy-nine".