It is an unprimeable number.
13608 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
213608 is an apocalyptic number.
13608 is a gapful number since it is divisible by the number (18) 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 13608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21840).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13608 is an equidigital number, since it uses as much as digits as its factorization.
13608 is an evil number, because the sum of its binary digits is even.
The square root of 13608 is about 116.6533325713. The cubic root of 13608 is about 23.8743432474.
The spelling of 13608 in words is "thirteen thousand, six hundred eight".