86728305389 has 4 divisors (see below), whose sum is σ = 94612696800. Its totient is φ = 78843913980.

The previous prime is 86728305379. The next prime is 86728305431. The reversal of 86728305389 is 98350382768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86728305389 - 2²⁰ = 86727256813 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 (86728305329) 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 3 ways as a sum of consecutive naturals, for example, 3942195689 + ... + 3942195710.

It is an arithmetic number, because the mean of its divisors is an integer number (23653174200).

Almost surely, 2^86728305389 is an apocalyptic number.

It is an amenable number.

86728305389 is a deficient number, since it is larger than the sum of its proper divisors (7884391411).

86728305389 is a wasteful number, since it uses less digits than its factorization.

86728305389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7884391410.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 86728305389 in words is "eighty-six billion, seven hundred twenty-eight million, three hundred five thousand, three hundred eighty-nine".