78864718 has 8 divisors (see below), whose sum is σ = 118349712. Its totient is φ = 39414816.

The previous prime is 78864707. The next prime is 78864719. The reversal of 78864718 is 81746887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78864719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2155 + ... + 12742.

It is an arithmetic number, because the mean of its divisors is an integer number (14793714).

Almost surely, 2^78864718 is an apocalyptic number.

78864718 is a deficient number, since it is larger than the sum of its proper divisors (39484994).

78864718 is a wasteful number, since it uses less digits than its factorization.

78864718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17546.

The product of its digits is 602112, while the sum is 49.

The square root of 78864718 is about 8880.5809494650. The cubic root of 78864718 is about 428.8389772468.

The spelling of 78864718 in words is "seventy-eight million, eight hundred sixty-four thousand, seven hundred eighteen".