6436 is a natural number that comes after 6435 and before 6437. It is an even and composite number. In mathematics, 6436 has the prime factorization 2^2 × 1609, since 6436 = 4 × 1609. Consequently, its divisors are 1, 2, 4, 1609, 3218, and 6436. The sum of its digits is 6 + 4 + 3 + 6 = 19, which does not divide 6436, so it is not a Harshad number. The square root of 6436 is approximately 80.2, so it is not a perfect square or cube. In practical use, 6436 can appear as a catalog number, model identifier, or other form of designation in various domains such as electronics, manufacturing, or literature. As a four-digit integer, it does not denote a single widely known object or concept; its meaning depends on the specific context in which it is employed.