9998984 has 8 divisors (see below), whose sum is σ = 18748110. Its totient is φ = 4999488.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9998984 is 4898999.

It can be written as a sum of positive squares in only one way, i.e., 8282884 + 1716100 = 2878^2 + 1310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624929 + ... + 624944.

Almost surely, 2^9998984 is an apocalyptic number.

It is an amenable number.

9998984 is a deficient number, since it is larger than the sum of its proper divisors (8749126).

9998984 is a wasteful number, since it uses less digits than its factorization.

9998984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249879 (or 1249875 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 56.

The square root of 9998984 is about 3162.1170123827. The cubic root of 9998984 is about 215.4361724039.

The spelling of 9998984 in words is "nine million, nine hundred ninety-eight thousand, nine hundred eighty-four".