678867 has 8 divisors (see below), whose sum is σ = 1034496. Its totient is φ = 387912.

The previous prime is 678859. The next prime is 678871. The reversal of 678867 is 768876.

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

It is not a de Polignac number, because 678867 - 2³ = 678859 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678867.

It is not an unprimeable number, because it can be changed into a prime (678367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16143 + ... + 16184.

It is an arithmetic number, because the mean of its divisors is an integer number (129312).

2⁶⁷⁸⁸⁶⁷ is an apocalyptic number.

678867 is a deficient number, since it is larger than the sum of its proper divisors (355629).

678867 is a wasteful number, since it uses less digits than its factorization.

678867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32337.

The product of its digits is 112896, while the sum is 42.

The square root of 678867 is about 823.9338565686. The cubic root of 678867 is about 87.8877269988.

Subtracting 678867 from its reverse (768876), we obtain a palindrome (90009).

The spelling of 678867 in words is "six hundred seventy-eight thousand, eight hundred sixty-seven".