It is a Curzon number.
It is a nialpdrome in base 13.
It is a zygodrome in base 13.
It is a congruent number.
It is an unprimeable number.
16590 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
216590 is an apocalyptic number.
16590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 16590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23040).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
16590 is a wasteful number, since it uses less digits than its factorization.
16590 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 96.
The square root of 16590 is about 128.8021738947. The cubic root of 16590 is about 25.5044206100.
The spelling of 16590 in words is "sixteen thousand, five hundred ninety".