7887

7887 is a natural number that follows 7886 and precedes 7888. In decimal notation, 7887 is a four-digit palindromic number, since it reads the same forwards and backwards (7-8-8-7). It is a composite number with prime factorization 3 × 11 × 239. Equivalently, 7887 = 11 × 717, and 717 = 3 × 239.

The even number of digits in 7887 explains its divisibility by 11, a property shared by all even-digit palindromes. The sum of its digits is 30, so 7887 is divisible by 3 (7887 ÷ 3 = 2629). It is not divisible by 9, because 30 is not a multiple of 9. The number is not a prime, and its square root is approximately 88.8, indicating it is far from a perfect square.

In broader mathematical context, 7887 is often cited as a straightforward example of a palindromic composite number. There are no widely recognized historical events or mathematical constants specifically associated with 7887. In non-mathematical contexts, 7887 may be used as an identifier, model number, or arbitrary code, depending on the organization, but such uses are incidental and not intrinsic to the number itself.