287486 has 4 divisors (see below), whose sum is σ = 431232. Its totient is φ = 143742.

The previous prime is 287449. The next prime is 287491. The reversal of 287486 is 684782.

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

It is a congruent number.

It is an unprimeable number.

287486 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71870 + ... + 71873.

It is an arithmetic number, because the mean of its divisors is an integer number (107808).

2²⁸⁷⁴⁸⁶ is an apocalyptic number.

287486 is a deficient number, since it is larger than the sum of its proper divisors (143746).

287486 is a wasteful number, since it uses less digits than its factorization.

287486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143745.

The product of its digits is 21504, while the sum is 35.

The square root of 287486 is about 536.1772095119. The cubic root of 287486 is about 65.9992347631. Note that the first 3 decimals are identical.

The spelling of 287486 in words is "two hundred eighty-seven thousand, four hundred eighty-six".