9881838 has 24 divisors (see below), whose sum is σ = 22204728. Its totient is φ = 3293784.

The previous prime is 9881827. The next prime is 9881857. The reversal of 9881838 is 8381889.

It is a junction number, because it is equal to n+sod(n) for n = 9881793 and 9881802.

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 11 ways as a sum of consecutive naturals, for example, 9681 + ... + 10652.

It is an arithmetic number, because the mean of its divisors is an integer number (925197).

Almost surely, 2^9881838 is an apocalyptic number.

9881838 is an abundant number, since it is smaller than the sum of its proper divisors (12322890).

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

9881838 is a wasteful number, since it uses less digits than its factorization.

9881838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20350 (or 20338 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 9881838 is about 3143.5390883525. The cubic root of 9881838 is about 214.5915302071.

The spelling of 9881838 in words is "nine million, eight hundred eighty-one thousand, eight hundred thirty-eight".