28388288129 has 2 divisors, whose sum is σ = 28388288130. Its totient is φ = 28388288128.

The previous prime is 28388288087. The next prime is 28388288167. The reversal of 28388288129 is 92188288382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22282428529 + 6105859600 = 149273^2 + 78140^2 .

It is a cyclic number.

It is not a de Polignac number, because 28388288129 - 2²⁰ = 28387239553 is a prime.

It is not a weakly prime, because it can be changed into another prime (28388288329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14194144064 + 14194144065.

It is an arithmetic number, because the mean of its divisors is an integer number (14194144065).

Almost surely, 2^28388288129 is an apocalyptic number.

It is an amenable number.

28388288129 is a deficient number, since it is larger than the sum of its proper divisors (1).

28388288129 is an equidigital number, since it uses as much as digits as its factorization.

28388288129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7077888, while the sum is 59.

The spelling of 28388288129 in words is "twenty-eight billion, three hundred eighty-eight million, two hundred eighty-eight thousand, one hundred twenty-nine".