9885681 has 24 divisors (see below), whose sum is σ = 16190720. Its totient is φ = 5762016.

The previous prime is 9885647. The next prime is 9885727. The reversal of 9885681 is 1865889.

9885681 is a `hidden beast` number, since 9 + 88 + 568 + 1 = 666.

9885681 is a nontrivial binomial coefficient, being equal to C(4447, 2).

It is not a de Polignac number, because 9885681 - 2¹¹ = 9883633 is a prime.

It is a super-2 number, since 2×9885681² = 195453377667522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9885611) 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, 1 + ... + 4446.

Almost surely, 2^9885681 is an apocalyptic number.

9885681 is the 4446-th triangular number.

It is an amenable number.

9885681 is a deficient number, since it is larger than the sum of its proper divisors (6305039).

9885681 is a wasteful number, since it uses less digits than its factorization.

9885681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485 (or 4482 counting only the distinct ones).

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

The square root of 9885681 is about 3144.1502826678. The cubic root of 9885681 is about 214.6193444784.

The spelling of 9885681 in words is "nine million, eight hundred eighty-five thousand, six hundred eighty-one".