9771216 has 80 divisors (see below), whose sum is σ = 31081344. Its totient is φ = 2575872.

The previous prime is 9771211. The next prime is 9771217. The reversal of 9771216 is 6121779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9771211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3250 + ... + 5486.

Almost surely, 2^9771216 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 9771216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15540672).

9771216 is an abundant number, since it is smaller than the sum of its proper divisors (21310128).

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

9771216 is a wasteful number, since it uses less digits than its factorization.

9771216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268 (or 2262 counting only the distinct ones).

The product of its digits is 5292, while the sum is 33.

The square root of 9771216 is about 3125.8944319986. The cubic root of 9771216 is about 213.7877769147.

The spelling of 9771216 in words is "nine million, seven hundred seventy-one thousand, two hundred sixteen".