22398158 has 4 divisors (see below), whose sum is σ = 33597240. Its totient is φ = 11199078.

The previous prime is 22398149. The next prime is 22398161. The reversal of 22398158 is 85189322.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5599538 + ... + 5599541.

It is an arithmetic number, because the mean of its divisors is an integer number (8399310).

Almost surely, 2^22398158 is an apocalyptic number.

22398158 is a deficient number, since it is larger than the sum of its proper divisors (11199082).

22398158 is a wasteful number, since it uses less digits than its factorization.

22398158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11199081.

The product of its digits is 34560, while the sum is 38.

The square root of 22398158 is about 4732.6692257118. The cubic root of 22398158 is about 281.8842222111.

The spelling of 22398158 in words is "twenty-two million, three hundred ninety-eight thousand, one hundred fifty-eight".