22398859 has 4 divisors (see below), whose sum is σ = 25598704. Its totient is φ = 19199016.

The previous prime is 22398851. The next prime is 22398881. The reversal of 22398859 is 95889322.

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 22398859 - 2³ = 22398851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22398851) 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, 1599912 + ... + 1599925.

It is an arithmetic number, because the mean of its divisors is an integer number (6399676).

Almost surely, 2^22398859 is an apocalyptic number.

22398859 is a deficient number, since it is larger than the sum of its proper divisors (3199845).

22398859 is an equidigital number, since it uses as much as digits as its factorization.

22398859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199844.

The product of its digits is 311040, while the sum is 46.

The square root of 22398859 is about 4732.7432848191. The cubic root of 22398859 is about 281.8871629109.

The spelling of 22398859 in words is "twenty-two million, three hundred ninety-eight thousand, eight hundred fifty-nine".