9899912 has 64 divisors (see below), whose sum is σ = 22118400. Its totient is φ = 4104000.

The previous prime is 9899891. The next prime is 9899921. The reversal of 9899912 is 2199989.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 51737 + ... + 51927.

It is an arithmetic number, because the mean of its divisors is an integer number (345600).

Almost surely, 2^9899912 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 9899912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11059200).

9899912 is an abundant number, since it is smaller than the sum of its proper divisors (12218488).

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

9899912 is a wasteful number, since it uses less digits than its factorization.

9899912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 254 counting only the distinct ones).

The product of its digits is 104976, while the sum is 47.

The square root of 9899912 is about 3146.4125603614. The cubic root of 9899912 is about 214.7222806840.

It can be divided in two parts, 989 and 9912, that added together give a palindrome (10901).

The spelling of 9899912 in words is "nine million, eight hundred ninety-nine thousand, nine hundred twelve".