22438289 has 2 divisors, whose sum is σ = 22438290. Its totient is φ = 22438288.

The previous prime is 22438279. The next prime is 22438307. The reversal of 22438289 is 98283422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 2007889 = 4520^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 22438289 - 2⁸ = 22438033 is a prime.

It is not a weakly prime, because it can be changed into another prime (22438219) 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 as a sum of consecutive naturals, namely, 11219144 + 11219145.

It is an arithmetic number, because the mean of its divisors is an integer number (11219145).

Almost surely, 2^22438289 is an apocalyptic number.

It is an amenable number.

22438289 is a deficient number, since it is larger than the sum of its proper divisors (1).

22438289 is an equidigital number, since it uses as much as digits as its factorization.

22438289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 22438289 is about 4736.9071132966. The cubic root of 22438289 is about 282.0524733432.

The spelling of 22438289 in words is "twenty-two million, four hundred thirty-eight thousand, two hundred eighty-nine".