286140 has 48 divisors (see below), whose sum is σ = 846720. Its totient is φ = 72000.

The previous prime is 286129. The next prime is 286163. The reversal of 286140 is 41682.

It is a congruent number.

It is an unprimeable number.

286140 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1015 + ... + 1265.

It is an arithmetic number, because the mean of its divisors is an integer number (17640).

2²⁸⁶¹⁴⁰ is an apocalyptic number.

286140 is a gapful number since it is divisible by the number (20) 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 286140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423360).

286140 is an abundant number, since it is smaller than the sum of its proper divisors (560580).

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

286140 is a wasteful number, since it uses less digits than its factorization.

286140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 286140 is about 534.9205548490. The cubic root of 286140 is about 65.8960715105.

The spelling of 286140 in words is "two hundred eighty-six thousand, one hundred forty".