3686

3686 is a natural number that follows 3685 and precedes 3687. It is even and composite.

Its prime factorization is 3686 = 2 × 19 × 97. Because all prime factors are distinct, 3686 is a square-free number. Consequently, it has eight positive divisors: 1, 2, 19, 38, 97, 194, 1843, and 3686.

In various numeral systems, 3686 has the following representations: binary 111001100110, hexadecimal 0xE66, and octal 7146. In Roman numerals it is MMMDCLXXXVI.

Additional properties include that the sum of digits is 23, so the number is not divisible by 3 or 9. It is congruent to 2 modulo 4 and is not a prime, given its factorization into three distinct primes.

Because of its factorization, 3686 is used mainly as an example of a small, square-free composite number in number-theory discussions. It can appear in problems involving divisor counts, base conversions, and modular arithmetic, where its simple prime structure helps illustrate concepts without introducing repeated factors.