22398665 has 8 divisors (see below), whose sum is σ = 28047168. Its totient is φ = 17139760.

The previous prime is 22398661. The next prime is 22398667. The reversal of 22398665 is 56689322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22398665 - 2² = 22398661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22398661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97271 + ... + 97500.

It is an arithmetic number, because the mean of its divisors is an integer number (3505896).

Almost surely, 2^22398665 is an apocalyptic number.

It is an amenable number.

22398665 is a deficient number, since it is larger than the sum of its proper divisors (5648503).

22398665 is a wasteful number, since it uses less digits than its factorization.

22398665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194799.

The product of its digits is 155520, while the sum is 41.

The square root of 22398665 is about 4732.7227892620. The cubic root of 22398665 is about 281.8863490857.

The spelling of 22398665 in words is "twenty-two million, three hundred ninety-eight thousand, six hundred sixty-five".