678318 has 16 divisors (see below), whose sum is σ = 1368576. Its totient is φ = 224120.

The previous prime is 678299. The next prime is 678329. The reversal of 678318 is 813876.

It is an Ulam number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 355 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (85536).

2⁶⁷⁸³¹⁸ is an apocalyptic number.

678318 is an abundant number, since it is smaller than the sum of its proper divisors (690258).

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

678318 is a wasteful number, since it uses less digits than its factorization.

678318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its digits is 8064, while the sum is 33.

The square root of 678318 is about 823.6006313742. The cubic root of 678318 is about 87.8640289967.

It can be divided in two parts, 67 and 8318, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 678318 in words is "six hundred seventy-eight thousand, three hundred eighteen".