22790399 has 4 divisors (see below), whose sum is σ = 22800336. Its totient is φ = 22780464.

The previous prime is 22790357. The next prime is 22790507. The reversal of 22790399 is 99309722.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22790399 - 2²⁰ = 21741823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22790099) 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, 422 + ... + 6764.

It is an arithmetic number, because the mean of its divisors is an integer number (5700084).

Almost surely, 2^22790399 is an apocalyptic number.

22790399 is a deficient number, since it is larger than the sum of its proper divisors (9937).

22790399 is an equidigital number, since it uses as much as digits as its factorization.

22790399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9936.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 22790399 is about 4773.9290945719. The cubic root of 22790399 is about 283.5201801768.

The spelling of 22790399 in words is "twenty-two million, seven hundred ninety thousand, three hundred ninety-nine".