28776293191 has 2 divisors, whose sum is σ = 28776293192. Its totient is φ = 28776293190.

The previous prime is 28776293177. The next prime is 28776293239. The reversal of 28776293191 is 19139267782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28776293191 - 2¹¹ = 28776291143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28776296191) 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, 14388146595 + 14388146596.

It is an arithmetic number, because the mean of its divisors is an integer number (14388146596).

Almost surely, 2^28776293191 is an apocalyptic number.

28776293191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28776293191 is an equidigital number, since it uses as much as digits as its factorization.

28776293191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 55.

The spelling of 28776293191 in words is "twenty-eight billion, seven hundred seventy-six million, two hundred ninety-three thousand, one hundred ninety-one".