15800 has 24 divisors (see below), whose sum is σ = 37200. Its totient is φ = 6240.

The previous prime is 15797. The next prime is 15803. The reversal of 15800 is 851.

It is an interprime number because it is at equal distance from previous prime (15797) and next prime (15803).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161 + ... + 239.

It is an arithmetic number, because the mean of its divisors is an integer number (1550).

2¹⁵⁸⁰⁰ is an apocalyptic number.

15800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18600).

15800 is an abundant number, since it is smaller than the sum of its proper divisors (21400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15800 is a wasteful number, since it uses less digits than its factorization.

15800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 15800 is about 125.6980508998. The cubic root of 15800 is about 25.0929870409.

The spelling of 15800 in words is "fifteen thousand, eight hundred".