28056968782879 has 4 divisors (see below), whose sum is σ = 28057617947376. Its totient is φ = 28056319618384.

The previous prime is 28056968782853. The next prime is 28056968782889. The reversal of 28056968782879 is 97828786965082.

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 28056968782879 - 2⁵ = 28056968782847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28056968782796 and 28056968782805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056968782889) 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, 324517414 + ... + 324603859.

It is an arithmetic number, because the mean of its divisors is an integer number (7014404486844).

Almost surely, 2^{28056968782879} is an apocalyptic number.

28056968782879 is a deficient number, since it is larger than the sum of its proper divisors (649164497).

28056968782879 is an equidigital number, since it uses as much as digits as its factorization.

28056968782879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649164496.

The product of its (nonzero) digits is 11705057280, while the sum is 85.

The spelling of 28056968782879 in words is "twenty-eight trillion, fifty-six billion, nine hundred sixty-eight million, seven hundred eighty-two thousand, eight hundred seventy-nine".