28778351827 has 2 divisors, whose sum is σ = 28778351828. Its totient is φ = 28778351826.

The previous prime is 28778351803. The next prime is 28778351837. The reversal of 28778351827 is 72815387782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28778351827 - 2¹¹ = 28778349779 is a prime.

It is not a weakly prime, because it can be changed into another prime (28778351837) 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, 14389175913 + 14389175914.

It is an arithmetic number, because the mean of its divisors is an integer number (14389175914).

Almost surely, 2^28778351827 is an apocalyptic number.

28778351827 is a deficient number, since it is larger than the sum of its proper divisors (1).

28778351827 is an equidigital number, since it uses as much as digits as its factorization.

28778351827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10536960, while the sum is 58.

The spelling of 28778351827 in words is "twenty-eight billion, seven hundred seventy-eight million, three hundred fifty-one thousand, eight hundred twenty-seven".