28938642833 has 2 divisors, whose sum is σ = 28938642834. Its totient is φ = 28938642832.

The previous prime is 28938642827. The next prime is 28938642959. The reversal of 28938642833 is 33824683982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18212312209 + 10726330624 = 134953^2 + 103568^2 .

It is a cyclic number.

It is not a de Polignac number, because 28938642833 - 2⁶ = 28938642769 is a prime.

It is not a weakly prime, because it can be changed into another prime (28938645833) 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, 14469321416 + 14469321417.

It is an arithmetic number, because the mean of its divisors is an integer number (14469321417).

Almost surely, 2^28938642833 is an apocalyptic number.

It is an amenable number.

28938642833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28938642833 is an equidigital number, since it uses as much as digits as its factorization.

28938642833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 56.

The spelling of 28938642833 in words is "twenty-eight billion, nine hundred thirty-eight million, six hundred forty-two thousand, eight hundred thirty-three".