It is a congruent number.
290972 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 90972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138684).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
90972 is a wasteful number, since it uses less digits than its factorization.
90972 is an odious number, because the sum of its binary digits is odd.
The square root of 90972 is about 301.6156494614. The cubic root of 90972 is about 44.9748007062.
The spelling of 90972 in words is "ninety thousand, nine hundred seventy-two".