9989898 has 16 divisors (see below), whose sum is σ = 20014176. Its totient is φ = 3324240.

The previous prime is 9989887. The next prime is 9989899. The reversal of 9989898 is 8989899.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9989899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3840 + ... + 5892.

It is an arithmetic number, because the mean of its divisors is an integer number (1250886).

Almost surely, 2^9989898 is an apocalyptic number.

9989898 is an abundant number, since it is smaller than the sum of its proper divisors (10024278).

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

9989898 is a wasteful number, since it uses less digits than its factorization.

9989898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869.

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

The square root of 9989898 is about 3160.6799901287. The cubic root of 9989898 is about 215.3708975630.

Subtracting from 9989898 its reverse (8989899), we obtain a palindrome (999999).

The spelling of 9989898 in words is "nine million, nine hundred eighty-nine thousand, eight hundred ninety-eight".