It is a plaindrome in base 12.
It is a nialpdrome in base 14.
It is a congruent number.
It is an unprimeable number.
23408 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
223408 is an apocalyptic number.
23408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 23408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23408 is a wasteful number, since it uses less digits than its factorization.
23408 is an evil number, because the sum of its binary digits is even.
The square root of 23408 is about 152.9967319912. The cubic root of 23408 is about 28.6058442423.
The spelling of 23408 in words is "twenty-three thousand, four hundred eight".