990216 has 48 divisors (see below), whose sum is σ = 2843100. Its totient is φ = 310272.

The previous prime is 990211. The next prime is 990239. The reversal of 990216 is 612099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 864900 + 125316 = 930^2 + 354^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 990216.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990216.

It is not an unprimeable number, because it can be changed into a prime (990211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 820 + ... + 1628.

2⁹⁹⁰²¹⁶ 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 990216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1421550).

990216 is an abundant number, since it is smaller than the sum of its proper divisors (1852884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

990216 is a wasteful number, since it uses less digits than its factorization.

990216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 990216 is about 995.0959752707. The cubic root of 990216 is about 99.6727972178.

The spelling of 990216 in words is "nine hundred ninety thousand, two hundred sixteen".