12400

12400 is a natural number that follows 12399 and precedes 12401. It is even and composite.

Prime factorization and basic properties: 12400 = 2^4 × 5^2 × 31. The number has 30 positive divisors. The sum of all divisors is 30752, so the sum of proper divisors is 18352, and 12400 is an abundant number with an abundance ratio of about 1.48.

Divisors and multiples: as a multiple of 100 and 31, 12400 can be written as 400 × 31 and as 124 × 100. Its divisors include numbers such as 1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 155, 200, 248, 310, 400, 496, 620, 775, 1240, 1550, 2480, 3100, 6200, and 12400.

Representations in other bases: in hexadecimal, 12400 is 0x3070.

Context and usage: as a round, non-prime integer with a factorization involving small primes, 12400 often appears in arithmetic examples, coding exercises, and datasets where a concrete, nontrivial composite number is convenient. Its factorization into 2^4, 5^2, and 31 highlights common prime components and their combinations in composite numbers.