22090 has 12 divisors (see below), whose sum is σ = 40626.
Its totient is φ = 8648.
The previous prime is 22079. The next prime is 22091. The reversal of 22090 is 9022.
22090 = T4 + T5 + ... +
22090 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in only one way, i.e., 19881 + 2209 = 141^2 + 47^2
22090 is strictly pandigital in base 6.
It is a self number, because there is not a number n which added to its sum of digits gives 22090.
It is not an unprimeable number, because it can be changed into a prime (22091) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 447 + ... + 493.
222090 is an apocalyptic number.
22090 is a deficient number, since it is larger than the sum of its proper divisors (18536).
22090 is an equidigital number, since it uses as much as digits as its factorization.
22090 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 101 (or 54 counting only the distinct ones).
The product of its (nonzero) digits is 36, while the sum is 13.
The square root of 22090 is about 148.6270500279.
The cubic root of 22090 is about 28.0585509478.
The spelling of 22090 in words is "twenty-two thousand, ninety".