22108990 has 16 divisors (see below), whose sum is σ = 39929760. Its totient is φ = 8813920.

The previous prime is 22108981. The next prime is 22108997. The reversal of 22108990 is 9980122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22108997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 6664.

It is an arithmetic number, because the mean of its divisors is an integer number (2495610).

Almost surely, 2^22108990 is an apocalyptic number.

22108990 is a deficient number, since it is larger than the sum of its proper divisors (17820770).

22108990 is a wasteful number, since it uses less digits than its factorization.

22108990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7427.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 22108990 is about 4702.0197787759. The cubic root of 22108990 is about 280.6658896309.

The spelling of 22108990 in words is "twenty-two million, one hundred eight thousand, nine hundred ninety".