28078603789 has 2 divisors, whose sum is σ = 28078603790. Its totient is φ = 28078603788.

The previous prime is 28078603739. The next prime is 28078603867. The reversal of 28078603789 is 98730687082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28078029225 + 574564 = 167565^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 28078603789 - 2¹⁹ = 28078079501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28078603739) 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, 14039301894 + 14039301895.

It is an arithmetic number, because the mean of its divisors is an integer number (14039301895).

Almost surely, 2^28078603789 is an apocalyptic number.

It is an amenable number.

28078603789 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078603789 is an equidigital number, since it uses as much as digits as its factorization.

28078603789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 28078603789 in words is "twenty-eight billion, seventy-eight million, six hundred three thousand, seven hundred eighty-nine".