28128356033 has 2 divisors, whose sum is σ = 28128356034. Its totient is φ = 28128356032.

The previous prime is 28128355999. The next prime is 28128356041. The reversal of 28128356033 is 33065382182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25207277824 + 2921078209 = 158768^2 + 54047^2 .

It is a cyclic number.

It is not a de Polignac number, because 28128356033 - 2¹⁰ = 28128355009 is a prime.

It is not a weakly prime, because it can be changed into another prime (28128356083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14064178016 + 14064178017.

It is an arithmetic number, because the mean of its divisors is an integer number (14064178017).

Almost surely, 2^28128356033 is an apocalyptic number.

It is an amenable number.

28128356033 is a deficient number, since it is larger than the sum of its proper divisors (1).

28128356033 is an equidigital number, since it uses as much as digits as its factorization.

28128356033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 28128356033 in words is "twenty-eight billion, one hundred twenty-eight million, three hundred fifty-six thousand, thirty-three".