28849877779 has 2 divisors, whose sum is σ = 28849877780. Its totient is φ = 28849877778.

The previous prime is 28849877741. The next prime is 28849877831. The reversal of 28849877779 is 97777894882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28849877779 - 2²⁹ = 28313006867 is a prime.

It is not a weakly prime, because it can be changed into another prime (28849827779) 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 as a sum of consecutive naturals, namely, 14424938889 + 14424938890.

It is an arithmetic number, because the mean of its divisors is an integer number (14424938890).

Almost surely, 2^28849877779 is an apocalyptic number.

28849877779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28849877779 is an equidigital number, since it uses as much as digits as its factorization.

28849877779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 796594176, while the sum is 76.

The spelling of 28849877779 in words is "twenty-eight billion, eight hundred forty-nine million, eight hundred seventy-seven thousand, seven hundred seventy-nine".