28212859993 has 2 divisors, whose sum is σ = 28212859994. Its totient is φ = 28212859992.

The previous prime is 28212859963. The next prime is 28212860033. The reversal of 28212859993 is 39995821282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23713536064 + 4499323929 = 153992^2 + 67077^2 .

It is a cyclic number.

It is not a de Polignac number, because 28212859993 - 2²¹ = 28210762841 is a prime.

It is not a weakly prime, because it can be changed into another prime (28212859943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14106429996 + 14106429997.

It is an arithmetic number, because the mean of its divisors is an integer number (14106429997).

Almost surely, 2^28212859993 is an apocalyptic number.

It is an amenable number.

28212859993 is a deficient number, since it is larger than the sum of its proper divisors (1).

28212859993 is an equidigital number, since it uses as much as digits as its factorization.

28212859993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 58.

The spelling of 28212859993 in words is "twenty-eight billion, two hundred twelve million, eight hundred fifty-nine thousand, nine hundred ninety-three".