28438575293 has 2 divisors, whose sum is σ = 28438575294. Its totient is φ = 28438575292.

The previous prime is 28438575257. The next prime is 28438575301. The reversal of 28438575293 is 39257583482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20614642084 + 7823933209 = 143578^2 + 88453^2 .

It is a cyclic number.

It is not a de Polignac number, because 28438575293 - 2²⁰ = 28437526717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28438572293) 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, 14219287646 + 14219287647.

It is an arithmetic number, because the mean of its divisors is an integer number (14219287647).

Almost surely, 2^28438575293 is an apocalyptic number.

It is an amenable number.

28438575293 is a deficient number, since it is larger than the sum of its proper divisors (1).

28438575293 is an equidigital number, since it uses as much as digits as its factorization.

28438575293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 56.

The spelling of 28438575293 in words is "twenty-eight billion, four hundred thirty-eight million, five hundred seventy-five thousand, two hundred ninety-three".