286889 has 4 divisors (see below), whose sum is σ = 292356. Its totient is φ = 281424.

The previous prime is 286873. The next prime is 286927. The reversal of 286889 is 988682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 988682 = 2 ⋅494341.

It can be written as a sum of positive squares in 2 ways, for example, as 133225 + 153664 = 365^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 286889 - 2⁴ = 286873 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 8² + 8³ + 6⁵ + 8⁶ + 9 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (286859) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2654 + ... + 2759.

It is an arithmetic number, because the mean of its divisors is an integer number (73089).

2²⁸⁶⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

286889 is a deficient number, since it is larger than the sum of its proper divisors (5467).

286889 is an equidigital number, since it uses as much as digits as its factorization.

286889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5466.

The product of its digits is 55296, while the sum is 41.

The square root of 286889 is about 535.6202012621. The cubic root of 286889 is about 65.9535179297.

The spelling of 286889 in words is "two hundred eighty-six thousand, eight hundred eighty-nine".