22198889 has 8 divisors (see below), whose sum is σ = 23600808. Its totient is φ = 20807680.

The previous prime is 22198877. The next prime is 22198903. The reversal of 22198889 is 98889122.

It can be written as a sum of positive squares in 4 ways, for example, as 8508889 + 13690000 = 2917^2 + 3700^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22198889 - 2⁴ = 22198873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22198819) 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, 1829 + ... + 6909.

It is an arithmetic number, because the mean of its divisors is an integer number (2950101).

Almost surely, 2^22198889 is an apocalyptic number.

It is an amenable number.

22198889 is a deficient number, since it is larger than the sum of its proper divisors (1401919).

22198889 is a wasteful number, since it uses less digits than its factorization.

22198889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355.

The product of its digits is 165888, while the sum is 47.

The square root of 22198889 is about 4711.5696959718. The cubic root of 22198889 is about 281.0457872983.

The spelling of 22198889 in words is "twenty-two million, one hundred ninety-eight thousand, eight hundred eighty-nine".