28788203513 has 2 divisors, whose sum is σ = 28788203514. Its totient is φ = 28788203512.

The previous prime is 28788203471. The next prime is 28788203539. The reversal of 28788203513 is 31530288782.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25847635984 + 2940567529 = 160772^2 + 54227^2 .

It is a cyclic number.

It is not a de Polignac number, because 28788203513 - 2³⁰ = 27714461689 is a prime.

It is not a weakly prime, because it can be changed into another prime (28788203593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14394101756 + 14394101757.

It is an arithmetic number, because the mean of its divisors is an integer number (14394101757).

Almost surely, 2^28788203513 is an apocalyptic number.

It is an amenable number.

28788203513 is a deficient number, since it is larger than the sum of its proper divisors (1).

28788203513 is an equidigital number, since it uses as much as digits as its factorization.

28788203513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 28788203513 in words is "twenty-eight billion, seven hundred eighty-eight million, two hundred three thousand, five hundred thirteen".