22198990 has 16 divisors (see below), whose sum is σ = 43590960. Its totient is φ = 8072320.

The previous prime is 22198987. The next prime is 22199029. The reversal of 22198990 is 9989122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100795 + ... + 101014.

It is an arithmetic number, because the mean of its divisors is an integer number (2724435).

Almost surely, 2^22198990 is an apocalyptic number.

22198990 is a deficient number, since it is larger than the sum of its proper divisors (21391970).

22198990 is a wasteful number, since it uses less digits than its factorization.

22198990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201827.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 22198990 is about 4711.5804142559. The cubic root of 22198990 is about 281.0462135295.

The spelling of 22198990 in words is "twenty-two million, one hundred ninety-eight thousand, nine hundred ninety".