285722 has 16 divisors (see below), whose sum is σ = 461760. Its totient is φ = 132192.

The previous prime is 285721. The next prime is 285731. The reversal of 285722 is 227582.

It is a super-2 number, since 2×285722² = 163274122568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2 + 8⁴ + 7⁵ + 5⁴ + 2¹¹ + 2¹⁸ .

It is a junction number, because it is equal to n+sod(n) for n = 285691 and 285700.

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 7 ways as a sum of consecutive naturals, for example, 2723 + ... + 2825.

It is an arithmetic number, because the mean of its divisors is an integer number (28860).

2²⁸⁵⁷²² is an apocalyptic number.

285722 is a deficient number, since it is larger than the sum of its proper divisors (176038).

285722 is a wasteful number, since it uses less digits than its factorization.

285722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its digits is 2240, while the sum is 26.

The square root of 285722 is about 534.5296998297. The cubic root of 285722 is about 65.8639683659.

The spelling of 285722 in words is "two hundred eighty-five thousand, seven hundred twenty-two".