991848 has 96 divisors (see below), whose sum is σ = 3094560. Its totient is φ = 261120.

The previous prime is 991817. The next prime is 991867. The reversal of 991848 is 848199.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58336 + ... + 58352.

It is an arithmetic number, because the mean of its divisors is an integer number (32235).

2⁹⁹¹⁸⁴⁸ 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 991848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547280).

991848 is an abundant number, since it is smaller than the sum of its proper divisors (2102712).

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

991848 is a wasteful number, since it uses less digits than its factorization.

991848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 46 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 991848 is about 995.9156590796. The cubic root of 991848 is about 99.7275249143.

The spelling of 991848 in words is "nine hundred ninety-one thousand, eight hundred forty-eight".