78809108 has 24 divisors (see below), whose sum is σ = 158760000. Its totient is φ = 33530688.

The previous prime is 78809051. The next prime is 78809123. The reversal of 78809108 is 80190887.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6233 + ... + 14016.

It is an arithmetic number, because the mean of its divisors is an integer number (6615000).

Almost surely, 2^78809108 is an apocalyptic number.

It is an amenable number.

78809108 is an abundant number, since it is smaller than the sum of its proper divisors (79950892).

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

78809108 is a wasteful number, since it uses less digits than its factorization.

78809108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20399 (or 20397 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 78809108 is about 8877.4494084731. The cubic root of 78809108 is about 428.7381575833.

The spelling of 78809108 in words is "seventy-eight million, eight hundred nine thousand, one hundred eight".