989040988 has 24 divisors (see below), whose sum is σ = 1924092800. Its totient is φ = 441754560.

The previous prime is 989040973. The next prime is 989040989. The reversal of 989040988 is 889040989.

It is a super-2 number, since 2×989040988² = 1956404151888032288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989040989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305163 + ... + 308386.

Almost surely, 2^989040988 is an apocalyptic number.

It is an amenable number.

989040988 is a deficient number, since it is larger than the sum of its proper divisors (935051812).

989040988 is a wasteful number, since it uses less digits than its factorization.

989040988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613597 (or 613595 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 989040988 is about 31449.0220515678. The cubic root of 989040988 is about 996.3335697179. Note that the first 3 decimals are identical.

Subtracting from 989040988 its reverse (889040989), we obtain a palindrome (99999999).

The spelling of 989040988 in words is "nine hundred eighty-nine million, forty thousand, nine hundred eighty-eight".