22590 has 24 divisors (see below), whose sum is σ = 58968. Its totient is φ = 6000.

The previous prime is 22573. The next prime is 22613. The reversal of 22590 is 9522.

22590 is nontrivially palindromic in base 14.

22590 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 36 + ... + 215.

It is an arithmetic number, because the mean of its divisors is an integer number (2457).

2²²⁵⁹⁰ is an apocalyptic number.

22590 is an abundant number, since it is smaller than the sum of its proper divisors (36378).

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 (29484).

22590 is a wasteful number, since it uses less digits than its factorization.

22590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 22590 is about 150.2997005985. The cubic root of 22590 is about 28.2686722302.

The spelling of 22590 in words is "twenty-two thousand, five hundred ninety".