23904 is nontrivially palindromic in base 11.
It is a tau number, because it is divible by the number of its divisors (36).
It is a congruent number.
23904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
223904 is an apocalyptic number.
23904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
23904 is the 83-rd nonagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 23904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34398).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23904 is a wasteful number, since it uses less digits than its factorization.
23904 is an odious number, because the sum of its binary digits is odd.
The square root of 23904 is about 154.6091847207. The cubic root of 23904 is about 28.8064800234.
The spelling of 23904 in words is "twenty-three thousand, nine hundred four".