989835678 has 48 divisors (see below), whose sum is σ = 2318106336. Its totient is φ = 303445440.

The previous prime is 989835667. The next prime is 989835683. The reversal of 989835678 is 876538989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57183 + ... + 72453.

It is an arithmetic number, because the mean of its divisors is an integer number (48293882).

Almost surely, 2^989835678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989835678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159053168).

989835678 is an abundant number, since it is smaller than the sum of its proper divisors (1328270658).

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

989835678 is a wasteful number, since it uses less digits than its factorization.

989835678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15569 (or 15566 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The square root of 989835678 is about 31461.6540887475. The cubic root of 989835678 is about 996.6003481311.

The spelling of 989835678 in words is "nine hundred eighty-nine million, eight hundred thirty-five thousand, six hundred seventy-eight".