23290 has 16 divisors (see below), whose sum is σ = 44712. Its totient is φ = 8704.

The previous prime is 23279. The next prime is 23291. The reversal of 23290 is 9232.

It can be written as a sum of positive squares in 4 ways, for example, as 21609 + 1681 = 147^2 + 41^2 .

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

23290 is an undulating number in base 13.

It is a plaindrome in base 12.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (23291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102 + ... + 238.

2²³²⁹⁰ is an apocalyptic number.

23290 is a deficient number, since it is larger than the sum of its proper divisors (21422).

23290 is a wasteful number, since it uses less digits than its factorization.

23290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

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

The square root of 23290 is about 152.6106156203. The cubic root of 23290 is about 28.5576957814.

It can be divided in two parts, 23 and 290, that multiplied together give a triangular number (6670 = T₁₁₅).

The spelling of 23290 in words is "twenty-three thousand, two hundred ninety".