78864868 has 24 divisors (see below), whose sum is σ = 143408384. Its totient is φ = 37908000.

The previous prime is 78864859. The next prime is 78864889. The reversal of 78864868 is 86846887.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17443 + ... + 21493.

Almost surely, 2^78864868 is an apocalyptic number.

It is an amenable number.

78864868 is a deficient number, since it is larger than the sum of its proper divisors (64543516).

78864868 is a wasteful number, since it uses less digits than its factorization.

78864868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243 (or 4241 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 55.

The square root of 78864868 is about 8880.5893948544. The cubic root of 78864868 is about 428.8392491293.

It can be divided in two parts, 788 and 64868, that added together give a palindrome (65656).

The spelling of 78864868 in words is "seventy-eight million, eight hundred sixty-four thousand, eight hundred sixty-eight".