9998784 has 42 divisors (see below), whose sum is σ = 28661360. Its totient is φ = 3332736.

The previous prime is 9998777. The next prime is 9998797. The reversal of 9998784 is 4878999.

It is a self number, because there is not a number n which added to its sum of digits gives 9998784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8104 + ... + 9255.

Almost surely, 2^9998784 is an apocalyptic number.

It is an amenable number.

9998784 is an abundant number, since it is smaller than the sum of its proper divisors (18662576).

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

9998784 is a wasteful number, since it uses less digits than its factorization.

9998784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17377 (or 17364 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 9998784 is about 3162.0853878414. The cubic root of 9998784 is about 215.4347360073.

The spelling of 9998784 in words is "nine million, nine hundred ninety-eight thousand, seven hundred eighty-four".