9977216 has 32 divisors (see below), whose sum is σ = 20746800. Its totient is φ = 4770304.

The previous prime is 9977213. The next prime is 9977237. The reversal of 9977216 is 6127799.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×9977216² = 199089678221312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250 + ... + 4638.

Almost surely, 2^9977216 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 9977216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10373400).

9977216 is an abundant number, since it is smaller than the sum of its proper divisors (10769584).

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

9977216 is a wasteful number, since it uses less digits than its factorization.

9977216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426 (or 3414 counting only the distinct ones).

The product of its digits is 47628, while the sum is 41.

The square root of 9977216 is about 3158.6731391519. The cubic root of 9977216 is about 215.2797224468.

The spelling of 9977216 in words is "nine million, nine hundred seventy-seven thousand, two hundred sixteen".