28225028009 has 2 divisors, whose sum is σ = 28225028010. Its totient is φ = 28225028008.

The previous prime is 28225027993. The next prime is 28225028011. The reversal of 28225028009 is 90082052282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17094778009 + 11130250000 = 130747^2 + 105500^2 .

It is a cyclic number.

It is not a de Polignac number, because 28225028009 - 2⁴ = 28225027993 is a prime.

It is a super-2 number, since 2×28225028009² (a number of 22 digits) contains 22 as substring.

Together with 28225028011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28225028309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14112514004 + 14112514005.

It is an arithmetic number, because the mean of its divisors is an integer number (14112514005).

Almost surely, 2^28225028009 is an apocalyptic number.

It is an amenable number.

28225028009 is a deficient number, since it is larger than the sum of its proper divisors (1).

28225028009 is an equidigital number, since it uses as much as digits as its factorization.

28225028009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 28225028009 in words is "twenty-eight billion, two hundred twenty-five million, twenty-eight thousand, nine".