78626868 has 12 divisors (see below), whose sum is σ = 183462720. Its totient is φ = 26208952.

The previous prime is 78626861. The next prime is 78626893. The reversal of 78626868 is 86862687.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 78626868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78626861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3276108 + ... + 3276131.

It is an arithmetic number, because the mean of its divisors is an integer number (15288560).

Almost surely, 2^78626868 is an apocalyptic number.

It is an amenable number.

78626868 is an abundant number, since it is smaller than the sum of its proper divisors (104835852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78626868 is a wasteful number, since it uses less digits than its factorization.

78626868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552246 (or 6552244 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 78626868 is about 8867.1792583662. The cubic root of 78626868 is about 428.4074278533.

The spelling of 78626868 in words is "seventy-eight million, six hundred twenty-six thousand, eight hundred sixty-eight".