285723 has 12 divisors (see below), whose sum is σ = 421200. Its totient is φ = 186576.

The previous prime is 285721. The next prime is 285731. The reversal of 285723 is 327582.

It is not a de Polignac number, because 285723 - 2¹ = 285721 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 8⁴ + 7⁵ + 5⁴ + 2¹⁸ + 3 .

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178 + ... + 776.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2²⁸⁵⁷²³ is an apocalyptic number.

285723 is a deficient number, since it is larger than the sum of its proper divisors (135477).

285723 is a wasteful number, since it uses less digits than its factorization.

285723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 655 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 285723 is about 534.5306352306. The cubic root of 285723 is about 65.8640452050.

The spelling of 285723 in words is "two hundred eighty-five thousand, seven hundred twenty-three".