9851982 has 16 divisors (see below), whose sum is σ = 22518912. Its totient is φ = 2814840.

The previous prime is 9851977. The next prime is 9851987. The reversal of 9851982 is 2891589.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9851977) and next prime (9851987).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 234571 = 9851982 / (9 + 8 + 5 + 1 + 9 + 8 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9851987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117244 + ... + 117327.

It is an arithmetic number, because the mean of its divisors is an integer number (1407432).

Almost surely, 2^9851982 is an apocalyptic number.

9851982 is an abundant number, since it is smaller than the sum of its proper divisors (12666930).

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

9851982 is a wasteful number, since it uses less digits than its factorization.

9851982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234583.

The product of its digits is 51840, while the sum is 42.

The square root of 9851982 is about 3138.7867082680. The cubic root of 9851982 is about 214.3751970407.

The spelling of 9851982 in words is "nine million, eight hundred fifty-one thousand, nine hundred eighty-two".