9991848 has 32 divisors (see below), whose sum is σ = 25061760. Its totient is φ = 3319680.

The previous prime is 9991847. The next prime is 9991879. The reversal of 9991848 is 8481999.

It is a junction number, because it is equal to n+sod(n) for n = 9991797 and 9991806.

It is not an unprimeable number, because it can be changed into a prime (9991847) 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, 10513 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (783180).

Almost surely, 2^9991848 is an apocalyptic number.

It is an amenable number.

9991848 is an abundant number, since it is smaller than the sum of its proper divisors (15069912).

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

9991848 is a wasteful number, since it uses less digits than its factorization.

9991848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377 (or 1373 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 9991848 is about 3160.9884530001. The cubic root of 9991848 is about 215.3849099159.

The spelling of 9991848 in words is "nine million, nine hundred ninety-one thousand, eight hundred forty-eight".