678740878 has 16 divisors (see below), whose sum is σ = 1090117440. Its totient is φ = 315817216.

The previous prime is 678740849. The next prime is 678740899. The reversal of 678740878 is 878047876.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109126 + ... + 115177.

It is an arithmetic number, because the mean of its divisors is an integer number (68132340).

Almost surely, 2^678740878 is an apocalyptic number.

678740878 is a deficient number, since it is larger than the sum of its proper divisors (411376562).

678740878 is a wasteful number, since it uses less digits than its factorization.

678740878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224411.

The product of its (nonzero) digits is 4214784, while the sum is 55.

The square root of 678740878 is about 26052.6558722906. The cubic root of 678740878 is about 878.8228397757.

The spelling of 678740878 in words is "six hundred seventy-eight million, seven hundred forty thousand, eight hundred seventy-eight".