28028218243093 has 2 divisors, whose sum is σ = 28028218243094. Its totient is φ = 28028218243092.

The previous prime is 28028218243079. The next prime is 28028218243121. The reversal of 28028218243093 is 39034281282082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25555279579729 + 2472938663364 = 5055223^2 + 1572558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28028218243093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28028218243093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28028218243033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14014109121546 + 14014109121547.

It is an arithmetic number, because the mean of its divisors is an integer number (14014109121547).

Almost surely, 2^{28028218243093} is an apocalyptic number.

It is an amenable number.

28028218243093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28028218243093 is an equidigital number, since it uses as much as digits as its factorization.

28028218243093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 28028218243093 in words is "twenty-eight trillion, twenty-eight billion, two hundred eighteen million, two hundred forty-three thousand, ninety-three".