34720 is nontrivially palindromic in base 6 and base 15.
It is an Ulam number.
It is a nialpdrome in base 14.
It is a congruent number.
34720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
234720 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 34720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48384).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
34720 is a wasteful number, since it uses less digits than its factorization.
34720 is an evil number, because the sum of its binary digits is even.
The square root of 34720 is about 186.3330351816. Note that the first 3 decimals coincide. The cubic root of 34720 is about 32.6232010184.
The spelling of 34720 in words is "thirty-four thousand, seven hundred twenty".