678386 has 8 divisors (see below), whose sum is σ = 1042524. Its totient is φ = 330880.

The previous prime is 678383. The next prime is 678401. The reversal of 678386 is 683876.

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 14161 = 815^2 + 119^2 .

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

It is not an unprimeable number, because it can be changed into a prime (678383) 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, 4055 + ... + 4218.

2⁶⁷⁸³⁸⁶ is an apocalyptic number.

678386 is a deficient number, since it is larger than the sum of its proper divisors (364138).

678386 is a wasteful number, since it uses less digits than its factorization.

678386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316.

The product of its digits is 48384, while the sum is 38.

The square root of 678386 is about 823.6419124838. The cubic root of 678386 is about 87.8669649620.

The spelling of 678386 in words is "six hundred seventy-eight thousand, three hundred eighty-six".