9987868 has 24 divisors (see below), whose sum is σ = 19514880. Its totient is φ = 4433520.

The previous prime is 9987853. The next prime is 9987877. The reversal of 9987868 is 8687899.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748 + ... + 4531.

It is an arithmetic number, because the mean of its divisors is an integer number (813120).

Almost surely, 2^9987868 is an apocalyptic number.

It is an amenable number.

9987868 is a deficient number, since it is larger than the sum of its proper divisors (9527012).

9987868 is a wasteful number, since it uses less digits than its factorization.

9987868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337 (or 5335 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 55.

The square root of 9987868 is about 3160.3588403851. The cubic root of 9987868 is about 215.3563084071.

The spelling of 9987868 in words is "nine million, nine hundred eighty-seven thousand, eight hundred sixty-eight".