9998988 has 24 divisors (see below), whose sum is σ = 24084480. Its totient is φ = 3225360.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9998988 is 8898999.

It is a super-2 number, since 2×9998988² = 199959522048288, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13068 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (1003520).

Almost surely, 2^9998988 is an apocalyptic number.

It is an amenable number.

9998988 is an abundant number, since it is smaller than the sum of its proper divisors (14085492).

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

9998988 is a wasteful number, since it uses less digits than its factorization.

9998988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26917 (or 26915 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 60.

The square root of 9998988 is about 3162.1176448703. The cubic root of 9998988 is about 215.4362011317.

The spelling of 9998988 in words is "nine million, nine hundred ninety-eight thousand, nine hundred eighty-eight".