285726 has 16 divisors (see below), whose sum is σ = 653184. Its totient is φ = 81624.

The previous prime is 285721. The next prime is 285731. The reversal of 285726 is 627582.

It is an interprime number because it is at equal distance from previous prime (285721) and next prime (285731).

It is a d-powerful number, because it can be written as 2⁷ + 8 + 7⁴ + 5⁵ + 2⁷ + 6⁷ .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 285693 and 285702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285721) by changing a digit.

285726 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360 + ... + 3443.

It is an arithmetic number, because the mean of its divisors is an integer number (40824).

2²⁸⁵⁷²⁶ is an apocalyptic number.

285726 is an abundant number, since it is smaller than the sum of its proper divisors (367458).

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

285726 is a wasteful number, since it uses less digits than its factorization.

285726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815.

The product of its digits is 6720, while the sum is 30.

The square root of 285726 is about 534.5334414235. The cubic root of 285726 is about 65.8642757213.

The spelling of 285726 in words is "two hundred eighty-five thousand, seven hundred twenty-six".