23090 has 8 divisors (see below), whose sum is σ = 41580. Its totient is φ = 9232.

The previous prime is 23087. The next prime is 23099. The reversal of 23090 is 9032.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22801 + 289 = 151^2 + 17^2 .

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

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23099) 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 3 ways as a sum of consecutive naturals, for example, 1145 + ... + 1164.

2²³⁰⁹⁰ is an apocalyptic number.

23090 is a deficient number, since it is larger than the sum of its proper divisors (18490).

23090 is a wasteful number, since it uses less digits than its factorization.

23090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 23090 is about 151.9539403898. The cubic root of 23090 is about 28.4757154372.

Adding to 23090 its sum of digits (14), we get a square (23104 = 152²).

The spelling of 23090 in words is "twenty-three thousand, ninety".