6400

6400 is the natural number that follows 6399 and precedes 6401. It is an even composite number and can be expressed as a product of primes: 6400 = 2^8 × 5^2. This factorization also shows that 6400 is a perfect square, since 6400 = 80^2, and thus its square root is 80. The prime factorization implies it has (8+1)×(2+1) = 27 positive divisors.

In different numeral systems, 6400 has representations such as binary 1100100000000, hexadecimal 0x1900, and octal 14400. Its decimal form ends with two trailing zeros, reflecting its divisibility by 100 (2^2 × 5^2).

In practical terms, 6400 has several everyday interpretations. For example, 6400 seconds equal 1 hour, 46 minutes, and 40 seconds. In digital storage conventions that use powers of two, 6400 bytes correspond to roughly 6.25 kilobytes (based on 1024 bytes per kilobyte). As a multiple of 80^2, 6400 also arises in contexts where squared scales or metric multiples are relevant.

Overall, 6400 is notable primarily for its mathematical properties—being a square, its prime factorization, and its various base representations—with its value appearing in timing and approximate storage measurements in everyday use.