78818079 has 16 divisors (see below), whose sum is σ = 110283264. Its totient is φ = 49975200.

The previous prime is 78818071. The next prime is 78818081. The reversal of 78818079 is 97081887.

It is not a de Polignac number, because 78818079 - 2³ = 78818071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78818071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9334 + ... + 15644.

It is an arithmetic number, because the mean of its divisors is an integer number (6892704).

Almost surely, 2^78818079 is an apocalyptic number.

78818079 is a deficient number, since it is larger than the sum of its proper divisors (31465185).

78818079 is a wasteful number, since it uses less digits than its factorization.

78818079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6518.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 78818079 is about 8877.9546630967. The cubic root of 78818079 is about 428.7544250097.

The spelling of 78818079 in words is "seventy-eight million, eight hundred eighteen thousand, seventy-nine".