22208990 has 16 divisors (see below), whose sum is σ = 40052448. Its totient is φ = 8866656.

The previous prime is 22208981. The next prime is 22209001. The reversal of 22208990 is 9980222.

It is a Curzon number.

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, 4319 + ... + 7941.

It is an arithmetic number, because the mean of its divisors is an integer number (2503278).

Almost surely, 2^22208990 is an apocalyptic number.

22208990 is a deficient number, since it is larger than the sum of its proper divisors (17843458).

22208990 is a wasteful number, since it uses less digits than its factorization.

22208990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 22208990 is about 4712.6415098117. The cubic root of 22208990 is about 281.0884082454.

The spelling of 22208990 in words is "twenty-two million, two hundred eight thousand, nine hundred ninety".