9915976 has 32 divisors (see below), whose sum is σ = 21450240. Its totient is φ = 4209408.

The previous prime is 9915949. The next prime is 9915979. The reversal of 9915976 is 6795199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9915979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5545 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (670320).

Almost surely, 2^9915976 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 9915976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10725120).

9915976 is an abundant number, since it is smaller than the sum of its proper divisors (11534264).

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

9915976 is a wasteful number, since it uses less digits than its factorization.

9915976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693 (or 1689 counting only the distinct ones).

The product of its digits is 153090, while the sum is 46.

The square root of 9915976 is about 3148.9642741702. The cubic root of 9915976 is about 214.8383569595.

It can be divided in two parts, 99159 and 76, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 9915976 in words is "nine million, nine hundred fifteen thousand, nine hundred seventy-six".