678034278 has 12 divisors (see below), whose sum is σ = 1469074308. Its totient is φ = 226011420.

The previous prime is 678034241. The next prime is 678034289. The reversal of 678034278 is 872430876.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 18834268 + ... + 18834303.

It is an arithmetic number, because the mean of its divisors is an integer number (122422859).

Almost surely, 2^678034278 is an apocalyptic number.

678034278 is an abundant number, since it is smaller than the sum of its proper divisors (791040030).

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

678034278 is a wasteful number, since it uses less digits than its factorization.

678034278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37668579 (or 37668576 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 678034278 is about 26039.0913435934. The cubic root of 678034278 is about 878.5177690918.

The spelling of 678034278 in words is "six hundred seventy-eight million, thirty-four thousand, two hundred seventy-eight".