286740 has 72 divisors (see below), whose sum is σ = 917280. Its totient is φ = 75168.

The previous prime is 286733. The next prime is 286751. The reversal of 286740 is 47682.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4831 + ... + 4889.

It is an arithmetic number, because the mean of its divisors is an integer number (12740).

2²⁸⁶⁷⁴⁰ is an apocalyptic number.

286740 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 286740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458640).

286740 is an abundant number, since it is smaller than the sum of its proper divisors (630540).

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

286740 is a wasteful number, since it uses less digits than its factorization.

286740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 286740 is about 535.4810921032. The cubic root of 286740 is about 65.9420979775.

The spelling of 286740 in words is "two hundred eighty-six thousand, seven hundred forty".