9990216 has 64 divisors (see below), whose sum is σ = 28142400. Its totient is φ = 3324240.

The previous prime is 9990209. The next prime is 9990221. The reversal of 9990216 is 6120999.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17211 + ... + 17781.

It is an arithmetic number, because the mean of its divisors is an integer number (439725).

Almost surely, 2^9990216 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 9990216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14071200).

9990216 is an abundant number, since it is smaller than the sum of its proper divisors (18152184).

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

9990216 is an equidigital number, since it uses as much as digits as its factorization.

9990216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 9990216 is about 3160.7302953590. The cubic root of 9990216 is about 215.3731827788.

The spelling of 9990216 in words is "nine million, nine hundred ninety thousand, two hundred sixteen".