22438399 has 2 divisors, whose sum is σ = 22438400. Its totient is φ = 22438398.

The previous prime is 22438379. The next prime is 22438421. The reversal of 22438399 is 99383422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22438399 - 2⁹ = 22437887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22438319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11219199 + 11219200.

It is an arithmetic number, because the mean of its divisors is an integer number (11219200).

Almost surely, 2^22438399 is an apocalyptic number.

22438399 is a deficient number, since it is larger than the sum of its proper divisors (1).

22438399 is an equidigital number, since it uses as much as digits as its factorization.

22438399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 22438399 is about 4736.9187242341. The cubic root of 22438399 is about 282.0529342477.

The spelling of 22438399 in words is "twenty-two million, four hundred thirty-eight thousand, three hundred ninety-nine".