986685984 has 144 divisors (see below), whose sum is σ = 3009726720. Its totient is φ = 305510400.

The previous prime is 986685977. The next prime is 986685991. The reversal of 986685984 is 489586689.

It is an interprime number because it is at equal distance from previous prime (986685977) and next prime (986685991).

It is a tau number, because it is divible by the number of its divisors (144).

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, 385509 + ... + 388059.

It is an arithmetic number, because the mean of its divisors is an integer number (20900880).

Almost surely, 2^986685984 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 986685984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1504863360).

986685984 is an abundant number, since it is smaller than the sum of its proper divisors (2023040736).

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

986685984 is a wasteful number, since it uses less digits than its factorization.

986685984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663 (or 2652 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The square root of 986685984 is about 31411.5581275428. The cubic root of 986685984 is about 995.5421517854.

The spelling of 986685984 in words is "nine hundred eighty-six million, six hundred eighty-five thousand, nine hundred eighty-four".