23898 has 16 divisors (see below), whose sum is σ = 54720. Its totient is φ = 6816.

The previous prime is 23893. The next prime is 23899. The reversal of 23898 is 89832.

It is a super-2 number, since 2×23898² = 1142228808, which contains 22 as substring.

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 (23893) by changing a digit.

23898 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 7 ways as a sum of consecutive naturals, for example, 243 + ... + 326.

It is an arithmetic number, because the mean of its divisors is an integer number (3420).

2²³⁸⁹⁸ is an apocalyptic number.

23898 is an abundant number, since it is smaller than the sum of its proper divisors (30822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27360).

23898 is a wasteful number, since it uses less digits than its factorization.

23898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its digits is 3456, while the sum is 30.

The square root of 23898 is about 154.5897797398. The cubic root of 23898 is about 28.8040696410.

The spelling of 23898 in words is "twenty-three thousand, eight hundred ninety-eight".