9813856 has 48 divisors (see below), whose sum is σ = 21506688. Its totient is φ = 4377600.

The previous prime is 9813829. The next prime is 9813871. The reversal of 9813856 is 6583189.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12516 + ... + 13276.

It is an arithmetic number, because the mean of its divisors is an integer number (448056).

Almost surely, 2^9813856 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 9813856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10753344).

9813856 is an abundant number, since it is smaller than the sum of its proper divisors (11692832).

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

9813856 is a wasteful number, since it uses less digits than its factorization.

9813856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 807 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 9813856 is about 3132.7074552214. The cubic root of 9813856 is about 214.0983040365.

The spelling of 9813856 in words is "nine million, eight hundred thirteen thousand, eight hundred fifty-six".