9998992 has 20 divisors (see below), whose sum is σ = 20513196. Its totient is φ = 4705280.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9998992 is 2998999.

It can be written as a sum of positive squares in 2 ways, for example, as 2944656 + 7054336 = 1716^2 + 2656^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18109 + ... + 18652.

Almost surely, 2^9998992 is an apocalyptic number.

It is an amenable number.

9998992 is an abundant number, since it is smaller than the sum of its proper divisors (10514204).

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

9998992 is a wasteful number, since it uses less digits than its factorization.

9998992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36786 (or 36780 counting only the distinct ones).

The product of its digits is 944784, while the sum is 55.

The square root of 9998992 is about 3162.1182773578. The cubic root of 9998992 is about 215.4362298594.

The spelling of 9998992 in words is "nine million, nine hundred ninety-eight thousand, nine hundred ninety-two".