22908990 has 32 divisors (see below), whose sum is σ = 59211936. Its totient is φ = 5639040.

The previous prime is 22908983. The next prime is 22909001. The reversal of 22908990 is 9980922.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 in 15 ways as a sum of consecutive naturals, for example, 28981 + ... + 29760.

It is an arithmetic number, because the mean of its divisors is an integer number (1850373).

Almost surely, 2^22908990 is an apocalyptic number.

22908990 is an abundant number, since it is smaller than the sum of its proper divisors (36302946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22908990 is a wasteful number, since it uses less digits than its factorization.

22908990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58764.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 22908990 is about 4786.3336699399. Note that the first 3 decimals coincide. The cubic root of 22908990 is about 284.0111002075.

The spelling of 22908990 in words is "twenty-two million, nine hundred eight thousand, nine hundred ninety".