286828 has 6 divisors (see below), whose sum is σ = 501956. Its totient is φ = 143412.

The previous prime is 286813. The next prime is 286831. The reversal of 286828 is 828682.

It is a happy number.

It is a d-powerful number, because it can be written as 2¹³ + 8 + 8² + 6² + 2¹⁴ + 8⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 286793 and 286802.

It is an unprimeable number.

286828 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, 35850 + ... + 35857.

2²⁸⁶⁸²⁸ is an apocalyptic number.

It is an amenable number.

286828 is a deficient number, since it is larger than the sum of its proper divisors (215128).

286828 is a wasteful number, since it uses less digits than its factorization.

286828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71711 (or 71709 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 286828 is about 535.5632549009. The cubic root of 286828 is about 65.9488431254.

The spelling of 286828 in words is "two hundred eighty-six thousand, eight hundred twenty-eight".