9899712 has 112 divisors (see below), whose sum is σ = 30906720. Its totient is φ = 3096576.

The previous prime is 9899693. The next prime is 9899731. The reversal of 9899712 is 2179989.

It is an interprime number because it is at equal distance from previous prime (9899693) and next prime (9899731).

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, 29208 + ... + 29544.

Almost surely, 2^9899712 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 9899712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15453360).

9899712 is an abundant number, since it is smaller than the sum of its proper divisors (21007008).

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

9899712 is a wasteful number, since it uses less digits than its factorization.

9899712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 359 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 9899712 is about 3146.3807779733. The cubic root of 9899712 is about 214.7208347201.

It can be divided in two parts, 989 and 9712, that added together give a palindrome (10701).

The spelling of 9899712 in words is "nine million, eight hundred ninety-nine thousand, seven hundred twelve".