989784680 has 64 divisors (see below), whose sum is σ = 2277849600. Its totient is φ = 386979840.

The previous prime is 989784671. The next prime is 989784683. The reversal of 989784680 is 86487989.

It is not an unprimeable number, because it can be changed into a prime (989784683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323960 + ... + 327000.

It is an arithmetic number, because the mean of its divisors is an integer number (35591400).

Almost surely, 2^989784680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989784680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1138924800).

989784680 is an abundant number, since it is smaller than the sum of its proper divisors (1288064920).

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

989784680 is a wasteful number, since it uses less digits than its factorization.

989784680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3230 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 59.

The square root of 989784680 is about 31460.8435996240. The cubic root of 989784680 is about 996.5832323281.

The spelling of 989784680 in words is "nine hundred eighty-nine million, seven hundred eighty-four thousand, six hundred eighty".