285682 has 4 divisors (see below), whose sum is σ = 428526. Its totient is φ = 142840.

The previous prime is 285673. The next prime is 285697. The reversal of 285682 is 286582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 286582 = 2 ⋅143291.

It can be written as a sum of positive squares in only one way, i.e., 281961 + 3721 = 531^2 + 61^2 .

It is a super-2 number, since 2×285682² = 163228410248, which contains 22 as substring.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 71419 + ... + 71422.

2²⁸⁵⁶⁸² is an apocalyptic number.

285682 is a deficient number, since it is larger than the sum of its proper divisors (142844).

285682 is a wasteful number, since it uses less digits than its factorization.

285682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142843.

The product of its digits is 7680, while the sum is 31.

The square root of 285682 is about 534.4922824513. The cubic root of 285682 is about 65.8608946536.

Subtracting 285682 from its reverse (286582), we obtain a square (900 = 30²).

The spelling of 285682 in words is "two hundred eighty-five thousand, six hundred eighty-two".