22490 has 16 divisors (see below), whose sum is σ = 43848. Its totient is φ = 8256.

The previous prime is 22483. The next prime is 22501. The reversal of 22490 is 9422.

It can be written as a sum of positive squares in 4 ways, for example, as 18769 + 3721 = 137^2 + 61^2 .

It is a plaindrome in base 7.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44 + ... + 216.

2²²⁴⁹⁰ is an apocalyptic number.

22490 is a deficient number, since it is larger than the sum of its proper divisors (21358).

22490 is a wasteful number, since it uses less digits than its factorization.

22490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 22490 is about 149.9666629621. The cubic root of 22490 is about 28.2268978643.

It can be divided in two parts, 22 and 490, that added together give a 9-th power (512 = 2⁹).

The spelling of 22490 in words is "twenty-two thousand, four hundred ninety".