9998910684 has 72 divisors (see below), whose sum is σ = 28913740128. Its totient is φ = 2854062720.

The previous prime is 9998910659. The next prime is 9998910697. The reversal of 9998910684 is 4860198999.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248674 + ... + 286070.

It is an arithmetic number, because the mean of its divisors is an integer number (401579724).

Almost surely, 2^9998910684 is an apocalyptic number.

It is an amenable number.

9998910684 is an abundant number, since it is smaller than the sum of its proper divisors (18914829444).

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

9998910684 is a wasteful number, since it uses less digits than its factorization.

9998910684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38475 (or 38470 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The square root of 9998910684 is about 99994.5532716658. The cubic root of 9998910684 is about 2154.3564585186.

The spelling of 9998910684 in words is "nine billion, nine hundred ninety-eight million, nine hundred ten thousand, six hundred eighty-four".