989838988 has 48 divisors (see below), whose sum is σ = 1811496960. Its totient is φ = 472897664.

The previous prime is 989838947. The next prime is 989839051. The reversal of 989838988 is 889838989.

It is a super-3 number, since 3×989838988³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2584245 + ... + 2584627.

It is an arithmetic number, because the mean of its divisors is an integer number (37739520).

Almost surely, 2^989838988 is an apocalyptic number.

It is an amenable number.

989838988 is a deficient number, since it is larger than the sum of its proper divisors (821657972).

989838988 is a wasteful number, since it uses less digits than its factorization.

989838988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 724 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 70.

The square root of 989838988 is about 31461.7066924221. The cubic root of 989838988 is about 996.6014590036.

Subtracting from 989838988 its reverse (889838989), we obtain a palindrome (99999999).

The spelling of 989838988 in words is "nine hundred eighty-nine million, eight hundred thirty-eight thousand, nine hundred eighty-eight".