28075622389 has 2 divisors, whose sum is σ = 28075622390. Its totient is φ = 28075622388.

The previous prime is 28075622299. The next prime is 28075622401. The reversal of 28075622389 is 98322657082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27702939364 + 372683025 = 166442^2 + 19305^2 .

It is a cyclic number.

It is not a de Polignac number, because 28075622389 - 2¹¹ = 28075620341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28075622189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14037811194 + 14037811195.

It is an arithmetic number, because the mean of its divisors is an integer number (14037811195).

Almost surely, 2^28075622389 is an apocalyptic number.

It is an amenable number.

28075622389 is a deficient number, since it is larger than the sum of its proper divisors (1).

28075622389 is an equidigital number, since it uses as much as digits as its factorization.

28075622389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 28075622389 in words is "twenty-eight billion, seventy-five million, six hundred twenty-two thousand, three hundred eighty-nine".