9856881 has 6 divisors (see below), whose sum is σ = 14237730. Its totient is φ = 6571248.

The previous prime is 9856843. The next prime is 9856883. The reversal of 9856881 is 1886589.

9856881 is a `hidden beast` number, since 9 + 8 + 568 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8208225 + 1648656 = 2865^2 + 1284^2 .

It is not a de Polignac number, because 9856881 - 2⁶ = 9856817 is a prime.

It is a super-2 number, since 2×9856881² = 194316206096322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9856883) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 547596 + ... + 547613.

It is an arithmetic number, because the mean of its divisors is an integer number (2372955).

Almost surely, 2^9856881 is an apocalyptic number.

It is an amenable number.

9856881 is a deficient number, since it is larger than the sum of its proper divisors (4380849).

9856881 is a wasteful number, since it uses less digits than its factorization.

9856881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095215 (or 1095212 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 9856881 is about 3139.5670083628. The cubic root of 9856881 is about 214.4107245809.

The spelling of 9856881 in words is "nine million, eight hundred fifty-six thousand, eight hundred eighty-one".