28807040497 has 2 divisors, whose sum is σ = 28807040498. Its totient is φ = 28807040496.

The previous prime is 28807040477. The next prime is 28807040567. The reversal of 28807040497 is 79404070882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17571888481 + 11235152016 = 132559^2 + 105996^2 .

It is a cyclic number.

It is not a de Polignac number, because 28807040497 - 2⁷ = 28807040369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28807040497.

It is not a weakly prime, because it can be changed into another prime (28807040417) 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, 14403520248 + 14403520249.

It is an arithmetic number, because the mean of its divisors is an integer number (14403520249).

Almost surely, 2^28807040497 is an apocalyptic number.

It is an amenable number.

28807040497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28807040497 is an equidigital number, since it uses as much as digits as its factorization.

28807040497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 28807040497 in words is "twenty-eight billion, eight hundred seven million, forty thousand, four hundred ninety-seven".