28223066489 has 2 divisors, whose sum is σ = 28223066490. Its totient is φ = 28223066488.

The previous prime is 28223066471. The next prime is 28223066561. The reversal of 28223066489 is 98466032282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16942927225 + 11280139264 = 130165^2 + 106208^2 .

It is a cyclic number.

It is not a de Polignac number, because 28223066489 - 2³² = 23928099193 is a prime.

It is not a weakly prime, because it can be changed into another prime (28223066419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111533244 + 14111533245.

It is an arithmetic number, because the mean of its divisors is an integer number (14111533245).

Almost surely, 2^28223066489 is an apocalyptic number.

It is an amenable number.

28223066489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28223066489 is an equidigital number, since it uses as much as digits as its factorization.

28223066489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 28223066489 in words is "twenty-eight billion, two hundred twenty-three million, sixty-six thousand, four hundred eighty-nine".