28041708109 has 2 divisors, whose sum is σ = 28041708110. Its totient is φ = 28041708108.

The previous prime is 28041708091. The next prime is 28041708139. The reversal of 28041708109 is 90180714082.

It is a happy number.

Together with previous prime (28041708091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27737903209 + 303804900 = 166547^2 + 17430^2 .

It is a cyclic number.

It is not a de Polignac number, because 28041708109 - 2²⁹ = 27504837197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28041708139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14020854054 + 14020854055.

It is an arithmetic number, because the mean of its divisors is an integer number (14020854055).

Almost surely, 2^28041708109 is an apocalyptic number.

It is an amenable number.

28041708109 is a deficient number, since it is larger than the sum of its proper divisors (1).

28041708109 is an equidigital number, since it uses as much as digits as its factorization.

28041708109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 28041708109 in words is "twenty-eight billion, forty-one million, seven hundred eight thousand, one hundred nine".