78718612 has 12 divisors (see below), whose sum is σ = 157437280. Its totient is φ = 33736536.

The previous prime is 78718597. The next prime is 78718657. The reversal of 78718612 is 21681787.

78718612 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405662 + ... + 1405717.

Almost surely, 2^78718612 is an apocalyptic number.

It is an amenable number.

78718612 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.

78718612 is a wasteful number, since it uses less digits than its factorization.

78718612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811390 (or 2811388 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The square root of 78718612 is about 8872.3509849419. The cubic root of 78718612 is about 428.5739889582.

The spelling of 78718612 in words is "seventy-eight million, seven hundred eighteen thousand, six hundred twelve".