78840030808 has 128 divisors (see below), whose sum is σ = 194715187200. Its totient is φ = 29026368000.

The previous prime is 78840030793. The next prime is 78840030809. The reversal of 78840030808 is 80803004887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78840030809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 792658 + ... + 886558.

It is an arithmetic number, because the mean of its divisors is an integer number (1521212400).

Almost surely, 2^78840030808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78840030808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97357593600).

78840030808 is an abundant number, since it is smaller than the sum of its proper divisors (115875156392).

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

78840030808 is a wasteful number, since it uses less digits than its factorization.

78840030808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94001 (or 93997 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 78840030808 in words is "seventy-eight billion, eight hundred forty million, thirty thousand, eight hundred eight".