287678 has 8 divisors (see below), whose sum is σ = 436968. Its totient is φ = 142024.

The previous prime is 287671. The next prime is 287681. The reversal of 287678 is 876782.

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

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 287678.

It is not an unprimeable number, because it can be changed into a prime (287671) by changing a digit.

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, 701 + ... + 1032.

It is an arithmetic number, because the mean of its divisors is an integer number (54621).

2²⁸⁷⁶⁷⁸ is an apocalyptic number.

287678 is a deficient number, since it is larger than the sum of its proper divisors (149290).

287678 is a wasteful number, since it uses less digits than its factorization.

287678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818.

The product of its digits is 37632, while the sum is 38.

The square root of 287678 is about 536.3562249103. The cubic root of 287678 is about 66.0139242125.

The spelling of 287678 in words is "two hundred eighty-seven thousand, six hundred seventy-eight".