286138 has 8 divisors (see below), whose sum is σ = 434880. Its totient is φ = 141180.

The previous prime is 286129. The next prime is 286163. The reversal of 286138 is 831682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (54360).

2²⁸⁶¹³⁸ is an apocalyptic number.

286138 is a deficient number, since it is larger than the sum of its proper divisors (148742).

286138 is a wasteful number, since it uses less digits than its factorization.

286138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892.

The product of its digits is 2304, while the sum is 28.

The square root of 286138 is about 534.9186854093. The cubic root of 286138 is about 65.8959179814.

It can be divided in two parts, 286 and 138, that added together give a palindrome (424).

The spelling of 286138 in words is "two hundred eighty-six thousand, one hundred thirty-eight".