28280417797 has 2 divisors, whose sum is σ = 28280417798. Its totient is φ = 28280417796.

The previous prime is 28280417749. The next prime is 28280417831. The reversal of 28280417797 is 79771408282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22300643556 + 5979774241 = 149334^2 + 77329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28280417797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28280417707) 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, 14140208898 + 14140208899.

It is an arithmetic number, because the mean of its divisors is an integer number (14140208899).

Almost surely, 2^28280417797 is an apocalyptic number.

It is an amenable number.

28280417797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28280417797 is an equidigital number, since it uses as much as digits as its factorization.

28280417797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The spelling of 28280417797 in words is "twenty-eight billion, two hundred eighty million, four hundred seventeen thousand, seven hundred ninety-seven".