286826 has 4 divisors (see below), whose sum is σ = 430242. Its totient is φ = 143412.

The previous prime is 286813. The next prime is 286831. The reversal of 286826 is 628682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 160801 + 126025 = 401^2 + 355^2 .

It is a super-3 number, since 3×286826³ = 70790797333103928, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 8² + 8⁶ + 6 + 2¹⁴ + 6² .

It is a junction number, because it is equal to n+sod(n) for n = 286792 and 286801.

It is an unprimeable 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, 71705 + ... + 71708.

2²⁸⁶⁸²⁶ is an apocalyptic number.

286826 is a deficient number, since it is larger than the sum of its proper divisors (143416).

286826 is a wasteful number, since it uses less digits than its factorization.

286826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143415.

The product of its digits is 9216, while the sum is 32.

The square root of 286826 is about 535.5613877045. The cubic root of 286826 is about 65.9486898419.

The spelling of 286826 in words is "two hundred eighty-six thousand, eight hundred twenty-six".