678509116 has 12 divisors (see below), whose sum is σ = 1189089720. Its totient is φ = 338769200.

The previous prime is 678509107. The next prime is 678509137. The reversal of 678509116 is 611905876.

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 3 ways as a sum of consecutive naturals, for example, 118186 + ... + 123793.

It is an arithmetic number, because the mean of its divisors is an integer number (99090810).

Almost surely, 2^678509116 is an apocalyptic number.

It is an amenable number.

678509116 is a deficient number, since it is larger than the sum of its proper divisors (510580604).

678509116 is a wasteful number, since it uses less digits than its factorization.

678509116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242684 (or 242682 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 678509116 is about 26048.2075390995. The cubic root of 678509116 is about 878.7228011441.

The spelling of 678509116 in words is "six hundred seventy-eight million, five hundred nine thousand, one hundred sixteen".