23490 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
It is an alternating number because its digits alternate between even and odd.
23490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
23490 is a Friedman number, since it can be written as 290*3^4, using all its digits and the basic arithmetic operations.
223490 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 23490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32670).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23490 is a wasteful number, since it uses less digits than its factorization.
23490 is an evil number, because the sum of its binary digits is even.
The square root of 23490 is about 153.2644772933. The cubic root of 23490 is about 28.6392081281.
The spelling of 23490 in words is "twenty-three thousand, four hundred ninety".