9985812 has 12 divisors (see below), whose sum is σ = 23300256. Its totient is φ = 3328600.

The previous prime is 9985799. The next prime is 9985853. The reversal of 9985812 is 2185899.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 416064 + ... + 416087.

It is an arithmetic number, because the mean of its divisors is an integer number (1941688).

Almost surely, 2^9985812 is an apocalyptic number.

It is an amenable number.

9985812 is an abundant number, since it is smaller than the sum of its proper divisors (13314444).

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

9985812 is a wasteful number, since it uses less digits than its factorization.

9985812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832158 (or 832156 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The square root of 9985812 is about 3160.0335441258. The cubic root of 9985812 is about 215.3415303799.

The spelling of 9985812 in words is "nine million, nine hundred eighty-five thousand, eight hundred twelve".