989878768 has 20 divisors (see below), whose sum is σ = 1921673880. Its totient is φ = 493962944.

The previous prime is 989878751. The next prime is 989878783. The reversal of 989878768 is 867878989.

It is a junction number, because it is equal to n+sod(n) for n = 989878697 and 989878706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52630 + ... + 68917.

It is an arithmetic number, because the mean of its divisors is an integer number (96083694).

Almost surely, 2^989878768 is an apocalyptic number.

It is an amenable number.

989878768 is a deficient number, since it is larger than the sum of its proper divisors (931795112).

989878768 is a wasteful number, since it uses less digits than its factorization.

989878768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122064 (or 122058 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 70.

The square root of 989878768 is about 31462.3388831790. The cubic root of 989878768 is about 996.6148094156.

The spelling of 989878768 in words is "nine hundred eighty-nine million, eight hundred seventy-eight thousand, seven hundred sixty-eight".