It is a nialpdrome in base 8.
It is an unprimeable number.
23500 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 3500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4368).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3500 is a wasteful number, since it uses less digits than its factorization.
3500 is an odious number, because the sum of its binary digits is odd.
The square root of 3500 is about 59.1607978310. The cubic root of 3500 is about 15.1829448594.
Adding to 3500 its reverse (53), we get a palindrome (3553).
The spelling of 3500 in words is "three thousand, five hundred".