28075622189 has 2 divisors, whose sum is σ = 28075622190. Its totient is φ = 28075622188.

The previous prime is 28075622171. The next prime is 28075622191. The reversal of 28075622189 is 98122657082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15217196164 + 12858426025 = 123358^2 + 113395^2 .

It is a cyclic number.

It is not a de Polignac number, because 28075622189 - 2⁸ = 28075621933 is a prime.

It is a super-2 number, since 2×28075622189² (a number of 22 digits) contains 22 as substring.

Together with 28075622191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28075622149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14037811094 + 14037811095.

It is an arithmetic number, because the mean of its divisors is an integer number (14037811095).

Almost surely, 2^28075622189 is an apocalyptic number.

It is an amenable number.

28075622189 is a deficient number, since it is larger than the sum of its proper divisors (1).

28075622189 is an equidigital number, since it uses as much as digits as its factorization.

28075622189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 28075622189 in words is "twenty-eight billion, seventy-five million, six hundred twenty-two thousand, one hundred eighty-nine".