It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990522.
990522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2990522 is an apocalyptic number.
990522 is the 498-th decagonal number.
It is a practical number, because each smaller number is the sum of distinct divisors of 990522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270080).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
990522 is a wasteful number, since it uses less digits than its factorization.
990522 is an evil number, because the sum of its binary digits is even.
The square root of 990522 is about 995.2497174076. The cubic root of 990522 is about 99.6830632388.
The spelling of 990522 in words is "nine hundred ninety thousand, five hundred twenty-two".