28928365841 has 2 divisors, whose sum is σ = 28928365842. Its totient is φ = 28928365840.

The previous prime is 28928365787. The next prime is 28928365861. The reversal of 28928365841 is 14856382982.

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., 21791664400 + 7136701441 = 147620^2 + 84479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28928365841 is a prime.

It is not a weakly prime, because it can be changed into another prime (28928365861) 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, 14464182920 + 14464182921.

It is an arithmetic number, because the mean of its divisors is an integer number (14464182921).

Almost surely, 2^28928365841 is an apocalyptic number.

It is an amenable number.

28928365841 is a deficient number, since it is larger than the sum of its proper divisors (1).

28928365841 is an equidigital number, since it uses as much as digits as its factorization.

28928365841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 56.

The spelling of 28928365841 in words is "twenty-eight billion, nine hundred twenty-eight million, three hundred sixty-five thousand, eight hundred forty-one".