28108134473 has 2 divisors, whose sum is σ = 28108134474. Its totient is φ = 28108134472.

The previous prime is 28108134463. The next prime is 28108134491. The reversal of 28108134473 is 37443180182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18408248329 + 9699886144 = 135677^2 + 98488^2 .

It is a cyclic number.

It is not a de Polignac number, because 28108134473 - 2¹⁴ = 28108118089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28108134473.

It is not a weakly prime, because it can be changed into another prime (28108134413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14054067236 + 14054067237.

It is an arithmetic number, because the mean of its divisors is an integer number (14054067237).

Almost surely, 2^28108134473 is an apocalyptic number.

It is an amenable number.

28108134473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28108134473 is an equidigital number, since it uses as much as digits as its factorization.

28108134473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 28108134473 in words is "twenty-eight billion, one hundred eight million, one hundred thirty-four thousand, four hundred seventy-three".