28713458779 has 16 divisors (see below), whose sum is σ = 30988820160. Its totient is φ = 26505768960.

The previous prime is 28713458747. The next prime is 28713458791. The reversal of 28713458779 is 97785431782.

It is not a de Polignac number, because 28713458779 - 2⁵ = 28713458747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28713458729) 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, 326842 + ... + 405280.

It is an arithmetic number, because the mean of its divisors is an integer number (1936801260).

Almost surely, 2^28713458779 is an apocalyptic number.

28713458779 is a deficient number, since it is larger than the sum of its proper divisors (2275361381).

28713458779 is a wasteful number, since it uses less digits than its factorization.

28713458779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78870.

The product of its digits is 23708160, while the sum is 61.

The spelling of 28713458779 in words is "twenty-eight billion, seven hundred thirteen million, four hundred fifty-eight thousand, seven hundred seventy-nine".