28520368342189 has 2 divisors, whose sum is σ = 28520368342190. Its totient is φ = 28520368342188.

The previous prime is 28520368342099. The next prime is 28520368342267. The reversal of 28520368342189 is 98124386302582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17795463830089 + 10724904512100 = 4218467^2 + 3274890^2 .

It is a cyclic number.

It is not a de Polignac number, because 28520368342189 - 2²⁹ = 28519831471277 is a prime.

It is a super-2 number, since 2×28520368342189² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28520368346189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14260184171094 + 14260184171095.

It is an arithmetic number, because the mean of its divisors is an integer number (14260184171095).

Almost surely, 2^{28520368342189} is an apocalyptic number.

It is an amenable number.

28520368342189 is a deficient number, since it is larger than the sum of its proper divisors (1).

28520368342189 is an equidigital number, since it uses as much as digits as its factorization.

28520368342189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 28520368342189 in words is "twenty-eight trillion, five hundred twenty billion, three hundred sixty-eight million, three hundred forty-two thousand, one hundred eighty-nine".