15804

15804 is the natural number that follows 15803 and precedes 15805. It is an even, composite integer with the prime factorization 2^2 × 3^2 × 439, where 439 is a prime number. This gives 15804 = 36 × 439, so it is divisible by 4, 9, and 36.

The divisors of 15804 include 1, 2, 3, 4, 6, 9, 12, 18, 36, 439, 878, 1317, 1756, 2634, 3951, 5268, 7902, and 15804, making a total of 18 positive divisors. The sum of all divisors, σ(15804), equals 40040, which means the sum of proper divisors is 40040 − 15804 = 24236. Because the proper divisors sum to more than the number itself, 15804 is classified as an abundant number.

Additional arithmetic properties include that the digits of 15804 sum to 18, so the number is a Harshad (Niven) number in base 10, with 15804 ÷ 18 = 878. The digital root of 15804 is 9, reflecting its divisibility by 9.

In summary, 15804 is an even, abundant, and Harshad number with a concise prime factorization of 2^2 × 3^2 × 439, where 439 is prime.