78859238389 has 8 divisors (see below), whose sum is σ = 83643389280. Its totient is φ = 74138454000.

The previous prime is 78859238363. The next prime is 78859238417. The reversal of 78859238389 is 98383295887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78859238389 - 2¹⁹ = 78858714101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78859238309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15839062 + ... + 15844039.

It is an arithmetic number, because the mean of its divisors is an integer number (10455423660).

Almost surely, 2^78859238389 is an apocalyptic number.

It is an amenable number.

78859238389 is a deficient number, since it is larger than the sum of its proper divisors (4784150891).

78859238389 is a wasteful number, since it uses less digits than its factorization.

78859238389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31683251.

The product of its digits is 209018880, while the sum is 70.

The spelling of 78859238389 in words is "seventy-eight billion, eight hundred fifty-nine million, two hundred thirty-eight thousand, three hundred eighty-nine".