23890 has 8 divisors (see below), whose sum is σ = 43020. Its totient is φ = 9552.

The previous prime is 23887. The next prime is 23893. The reversal of 23890 is 9832.

It is an interprime number because it is at equal distance from previous prime (23887) and next prime (23893).

It can be written as a sum of positive squares in 2 ways, for example, as 22801 + 1089 = 151^2 + 33^2 .

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 plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (23893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185 + ... + 1204.

2²³⁸⁹⁰ is an apocalyptic number.

23890 is a deficient number, since it is larger than the sum of its proper divisors (19130).

23890 is a wasteful number, since it uses less digits than its factorization.

23890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 23890 is about 154.5639026422. The cubic root of 23890 is about 28.8008551701.

The spelling of 23890 in words is "twenty-three thousand, eight hundred ninety".