9863856 has 120 divisors (see below), whose sum is σ = 29789760. Its totient is φ = 3157056.

The previous prime is 9863851. The next prime is 9863923. The reversal of 9863856 is 6583689.

9863856 is a `hidden beast` number, since 9 + 8 + 638 + 5 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9863851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167155 + ... + 167213.

It is an arithmetic number, because the mean of its divisors is an integer number (248248).

Almost surely, 2^9863856 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 9863856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14894880).

9863856 is an abundant number, since it is smaller than the sum of its proper divisors (19925904).

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

9863856 is a wasteful number, since it uses less digits than its factorization.

9863856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 107 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 9863856 is about 3140.6776338873. The cubic root of 9863856 is about 214.4612869643.

The spelling of 9863856 in words is "nine million, eight hundred sixty-three thousand, eight hundred fifty-six".