28704558816079 has 4 divisors (see below), whose sum is σ = 28769945055280. Its totient is φ = 28639172576880.

The previous prime is 28704558816029. The next prime is 28704558816097. The reversal of 28704558816079 is 97061885540782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28704558816079 - 2¹⁷ = 28704558685007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28704558815999 and 28704558816017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704558816029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32693118942 + ... + 32693119819.

It is an arithmetic number, because the mean of its divisors is an integer number (7192486263820).

Almost surely, 2^{28704558816079} is an apocalyptic number.

28704558816079 is a deficient number, since it is larger than the sum of its proper divisors (65386239201).

28704558816079 is an equidigital number, since it uses as much as digits as its factorization.

28704558816079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65386239200.

The product of its (nonzero) digits is 270950400, while the sum is 70.

The spelling of 28704558816079 in words is "twenty-eight trillion, seven hundred four billion, five hundred fifty-eight million, eight hundred sixteen thousand, seventy-nine".