678346878 has 32 divisors (see below), whose sum is σ = 1491701760. Its totient is φ = 203938560.

The previous prime is 678346849. The next prime is 678346883. The reversal of 678346878 is 878643876.

678346878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32083 + ... + 48846.

It is an arithmetic number, because the mean of its divisors is an integer number (46615680).

Almost surely, 2^678346878 is an apocalyptic number.

678346878 is an abundant number, since it is smaller than the sum of its proper divisors (813354882).

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

678346878 is a wasteful number, since it uses less digits than its factorization.

678346878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81072.

The product of its digits is 10838016, while the sum is 57.

The square root of 678346878 is about 26045.0931655082. The cubic root of 678346878 is about 878.6527585607.

The spelling of 678346878 in words is "six hundred seventy-eight million, three hundred forty-six thousand, eight hundred seventy-eight".