285716 has 6 divisors (see below), whose sum is σ = 500010. Its totient is φ = 142856.

The previous prime is 285709. The next prime is 285721. The reversal of 285716 is 617582.

It can be written as a sum of positive squares in only one way, i.e., 163216 + 122500 = 404^2 + 350^2 .

It is a congruent number.

It is an unprimeable number.

285716 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35711 + ... + 35718.

It is an arithmetic number, because the mean of its divisors is an integer number (83335).

2²⁸⁵⁷¹⁶ is an apocalyptic number.

It is an amenable number.

285716 is a deficient number, since it is larger than the sum of its proper divisors (214294).

285716 is a wasteful number, since it uses less digits than its factorization.

285716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71433 (or 71431 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 285716 is about 534.5240873899. The cubic root of 285716 is about 65.8635073273.

It can be divided in two parts, 285 and 716, that added together give a palindrome (1001).

The spelling of 285716 in words is "two hundred eighty-five thousand, seven hundred sixteen".