22990 has 24 divisors (see below), whose sum is σ = 47880. Its totient is φ = 7920.

The previous prime is 22973. The next prime is 22993. The reversal of 22990 is 9922.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a plaindrome in base 12 and base 16.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22993) by changing a digit.

22990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1201 + ... + 1219.

It is an arithmetic number, because the mean of its divisors is an integer number (1995).

2²²⁹⁹⁰ is an apocalyptic number.

22990 is an abundant number, since it is smaller than the sum of its proper divisors (24890).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23940).

22990 is a wasteful number, since it uses less digits than its factorization.

22990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 22990 is about 151.6245362730. The cubic root of 22990 is about 28.4345476547.

It can be divided in two parts, 2 and 2990, that added together give a palindrome (2992).

The spelling of 22990 in words is "twenty-two thousand, nine hundred ninety".