9907216 has 40 divisors (see below), whose sum is σ = 21123648. Its totient is φ = 4464000.

The previous prime is 9907211. The next prime is 9907229. The reversal of 9907216 is 6127099.

It is not an unprimeable number, because it can be changed into a prime (9907211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31701 + ... + 32011.

Almost surely, 2^9907216 is an apocalyptic number.

9907216 is the 1991-st heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9907216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10561824).

9907216 is an abundant number, since it is smaller than the sum of its proper divisors (11216432).

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

9907216 is a wasteful number, since it uses less digits than its factorization.

9907216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 9907216 is about 3147.5730333068. The cubic root of 9907216 is about 214.7750739478.

The spelling of 9907216 in words is "nine million, nine hundred seven thousand, two hundred sixteen".