985986 has 48 divisors (see below), whose sum is σ = 2383200. Its totient is φ = 301320.

The previous prime is 985981. The next prime is 985991. The reversal of 985986 is 689589.

It is an interprime number because it is at equal distance from previous prime (985981) and next prime (985991).

It is not an unprimeable number, because it can be changed into a prime (985981) by changing a digit.

985986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31791 + ... + 31821.

It is an arithmetic number, because the mean of its divisors is an integer number (49650).

2⁹⁸⁵⁹⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1191600).

985986 is an abundant number, since it is smaller than the sum of its proper divisors (1397214).

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

985986 is a wasteful number, since it uses less digits than its factorization.

985986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 55 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 985986 is about 992.9682774389. The cubic root of 985986 is about 99.5306673816.

It can be divided in two parts, 98 and 5986, that added together give a square (6084 = 78²).

The spelling of 985986 in words is "nine hundred eighty-five thousand, nine hundred eighty-six".