9986812 has 24 divisors (see below), whose sum is σ = 19393920. Its totient is φ = 4461360.

The previous prime is 9986791. The next prime is 9986813. The reversal of 9986812 is 2186899.

It is a happy number.

9986812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673 + ... + 4519.

It is an arithmetic number, because the mean of its divisors is an integer number (808080).

Almost surely, 2^9986812 is an apocalyptic number.

It is an amenable number.

9986812 is a deficient number, since it is larger than the sum of its proper divisors (9407108).

9986812 is a wasteful number, since it uses less digits than its factorization.

9986812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921 (or 3919 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 9986812 is about 3160.1917663332. The cubic root of 9986812 is about 215.3487183896.

The spelling of 9986812 in words is "nine million, nine hundred eighty-six thousand, eight hundred twelve".