78916842 has 40 divisors (see below), whose sum is σ = 186146400. Its totient is φ = 24920136.

The previous prime is 78916837. The next prime is 78916853. The reversal of 78916842 is 24861987.

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 19 ways as a sum of consecutive naturals, for example, 9742 + ... + 15897.

It is an arithmetic number, because the mean of its divisors is an integer number (4653660).

Almost surely, 2^78916842 is an apocalyptic number.

78916842 is an abundant number, since it is smaller than the sum of its proper divisors (107229558).

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

78916842 is a wasteful number, since it uses less digits than its factorization.

78916842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25672 (or 25663 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 78916842 is about 8883.5151826290. The cubic root of 78916842 is about 428.9334338499.

The spelling of 78916842 in words is "seventy-eight million, nine hundred sixteen thousand, eight hundred forty-two".