9821982 has 8 divisors (see below), whose sum is σ = 19643976. Its totient is φ = 3273992.

The previous prime is 9821957. The next prime is 9822019. The reversal of 9821982 is 2891289.

It is a sphenic number, since it is the product of 3 distinct primes.

9821982 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 9821982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818493 + ... + 818504.

It is an arithmetic number, because the mean of its divisors is an integer number (2455497).

Almost surely, 2^9821982 is an apocalyptic number.

9821982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

9821982 is a wasteful number, since it uses less digits than its factorization.

9821982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637002.

The product of its digits is 20736, while the sum is 39.

The square root of 9821982 is about 3134.0041480509. The cubic root of 9821982 is about 214.1573797915.

The spelling of 9821982 in words is "nine million, eight hundred twenty-one thousand, nine hundred eighty-two".