28540308893 has 2 divisors, whose sum is σ = 28540308894. Its totient is φ = 28540308892.

The previous prime is 28540308887. The next prime is 28540308919. The reversal of 28540308893 is 39880304582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28403372089 + 136936804 = 168533^2 + 11702^2 .

It is a cyclic number.

It is not a de Polignac number, because 28540308893 - 2⁴ = 28540308877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28540304893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14270154446 + 14270154447.

It is an arithmetic number, because the mean of its divisors is an integer number (14270154447).

Almost surely, 2^28540308893 is an apocalyptic number.

It is an amenable number.

28540308893 is a deficient number, since it is larger than the sum of its proper divisors (1).

28540308893 is an equidigital number, since it uses as much as digits as its factorization.

28540308893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 28540308893 in words is "twenty-eight billion, five hundred forty million, three hundred eight thousand, eight hundred ninety-three".