678846138 has 8 divisors (see below), whose sum is σ = 1357692288. Its totient is φ = 226282044.

The previous prime is 678846137. The next prime is 678846151. The reversal of 678846138 is 831648876.

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

678846138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (678846137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56570506 + ... + 56570517.

It is an arithmetic number, because the mean of its divisors is an integer number (169711536).

Almost surely, 2^678846138 is an apocalyptic number.

678846138 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.

678846138 is a wasteful number, since it uses less digits than its factorization.

678846138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113141028.

The product of its digits is 1548288, while the sum is 51.

The square root of 678846138 is about 26054.6759335057. The cubic root of 678846138 is about 878.8682670826.

The spelling of 678846138 in words is "six hundred seventy-eight million, eight hundred forty-six thousand, one hundred thirty-eight".