3985

3985 is a natural number that lies between 3984 and 3986. It is an odd composite number and is divisible by 5. In its prime factorization it factors as 5 × 797, where 797 is a prime number. This makes 3985 a semiprime, and it is not a prime or a higher power.

Its divisors are 1, 5, 797, and 3985, giving a total of four divisors. The sum of all divisors is 4788, which means the sum of its proper divisors is 803. Since 803 is less than 3985, the number is classified as deficient. In base representations, 3985 is written as 0xF91 in hexadecimal and as 111110010001 in binary. In Roman numerals, it is MMMCMLXXXV.

There are no widely recognized special names or constant values associated with 3985. It serves mainly as an example in discussions of semiprimes, divisor sums, and basic properties of composite numbers. Its simple factorization into two distinct primes makes it a useful case for illustrating how divisor functions behave for semiprimes, including divisor counts, sums, and deficiency.