9985881 has 8 divisors (see below), whose sum is σ = 13513504. Its totient is φ = 6557760.

The previous prime is 9985879. The next prime is 9985891. The reversal of 9985881 is 1885899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9985881 - 2¹ = 9985879 is a prime.

It is a super-2 number, since 2×9985881² = 199435638692322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9985881.

It is not an unprimeable number, because it can be changed into a prime (9985891) 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 7 ways as a sum of consecutive naturals, for example, 24640 + ... + 25041.

It is an arithmetic number, because the mean of its divisors is an integer number (1689188).

Almost surely, 2^9985881 is an apocalyptic number.

It is an amenable number.

9985881 is a deficient number, since it is larger than the sum of its proper divisors (3527623).

9985881 is a wasteful number, since it uses less digits than its factorization.

9985881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49751.

The product of its digits is 207360, while the sum is 48.

The square root of 9985881 is about 3160.0444617125. The cubic root of 9985881 is about 215.3420263680.

The spelling of 9985881 in words is "nine million, nine hundred eighty-five thousand, eight hundred eighty-one".