286838 has 4 divisors (see below), whose sum is σ = 430260. Its totient is φ = 143418.

The previous prime is 286831. The next prime is 286859. The reversal of 286838 is 838682.

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

It is a junction number, because it is equal to n+sod(n) for n = 286798 and 286807.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 286838.

It is not an unprimeable number, because it can be changed into a prime (286831) by changing a digit.

286838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71708 + ... + 71711.

It is an arithmetic number, because the mean of its divisors is an integer number (107565).

2²⁸⁶⁸³⁸ is an apocalyptic number.

286838 is a deficient number, since it is larger than the sum of its proper divisors (143422).

286838 is a wasteful number, since it uses less digits than its factorization.

286838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143421.

The product of its digits is 18432, while the sum is 35.

The square root of 286838 is about 535.5725907849. The cubic root of 286838 is about 65.9496095322.

The spelling of 286838 in words is "two hundred eighty-six thousand, eight hundred thirty-eight".