9998636 has 12 divisors (see below), whose sum is σ = 18418680. Its totient is φ = 4736160.

The previous prime is 9998633. The next prime is 9998641. The reversal of 9998636 is 6368999.

It is not an unprimeable number, because it can be changed into a prime (9998633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65705 + ... + 65856.

It is an arithmetic number, because the mean of its divisors is an integer number (1534890).

Almost surely, 2^9998636 is an apocalyptic number.

It is an amenable number.

9998636 is a deficient number, since it is larger than the sum of its proper divisors (8420044).

9998636 is a wasteful number, since it uses less digits than its factorization.

9998636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131584 (or 131582 counting only the distinct ones).

The product of its digits is 629856, while the sum is 50.

The square root of 9998636 is about 3162.0619854772. The cubic root of 9998636 is about 215.4336730614.

The spelling of 9998636 in words is "nine million, nine hundred ninety-eight thousand, six hundred thirty-six".