22390 has 8 divisors (see below), whose sum is σ = 40320. Its totient is φ = 8952.

The previous prime is 22381. The next prime is 22391. The reversal of 22390 is 9322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22391) by changing a digit.

22390 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 3 ways as a sum of consecutive naturals, for example, 1110 + ... + 1129.

It is an arithmetic number, because the mean of its divisors is an integer number (5040).

2²²³⁹⁰ is an apocalyptic number.

22390 is a deficient number, since it is larger than the sum of its proper divisors (17930).

22390 is a wasteful number, since it uses less digits than its factorization.

22390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 22390 is about 149.6328840864. The cubic root of 22390 is about 28.1849994832.

It can be divided in two parts, 223 and 90, that added together give a palindrome (313).

The spelling of 22390 in words is "twenty-two thousand, three hundred ninety".