28288770229 has 2 divisors, whose sum is σ = 28288770230. Its totient is φ = 28288770228.

The previous prime is 28288770203. The next prime is 28288770269. The reversal of 28288770229 is 92207788282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15894401329 + 12394368900 = 126073^2 + 111330^2 .

It is a cyclic number.

It is not a de Polignac number, because 28288770229 - 2⁵ = 28288770197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28288770229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28288770269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144385114 + 14144385115.

It is an arithmetic number, because the mean of its divisors is an integer number (14144385115).

Almost surely, 2^28288770229 is an apocalyptic number.

It is an amenable number.

28288770229 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288770229 is an equidigital number, since it uses as much as digits as its factorization.

28288770229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 28288770229 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred seventy thousand, two hundred twenty-nine".