678894 has 8 divisors (see below), whose sum is σ = 1357800. Its totient is φ = 226296.

The previous prime is 678883. The next prime is 678901. The reversal of 678894 is 498876.

It is a happy number.

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

678894 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56569 + ... + 56580.

It is an arithmetic number, because the mean of its divisors is an integer number (169725).

2⁶⁷⁸⁸⁹⁴ is an apocalyptic number.

678894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678894 is a wasteful number, since it uses less digits than its factorization.

678894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113154.

The product of its digits is 96768, while the sum is 42.

The square root of 678894 is about 823.9502412161. The cubic root of 678894 is about 87.8888921446. Note that the first 4 decimals are identical.

The spelling of 678894 in words is "six hundred seventy-eight thousand, eight hundred ninety-four".