28449486473 has 2 divisors, whose sum is σ = 28449486474. Its totient is φ = 28449486472.

The previous prime is 28449486437. The next prime is 28449486491. The reversal of 28449486473 is 37468494482.

Together with previous prime (28449486437) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26428354624 + 2021131849 = 162568^2 + 44957^2 .

It is a cyclic number.

It is not a de Polignac number, because 28449486473 - 2⁸ = 28449486217 is a prime.

It is not a weakly prime, because it can be changed into another prime (28449486493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14224743236 + 14224743237.

It is an arithmetic number, because the mean of its divisors is an integer number (14224743237).

Almost surely, 2^28449486473 is an apocalyptic number.

It is an amenable number.

28449486473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28449486473 is an equidigital number, since it uses as much as digits as its factorization.

28449486473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37158912, while the sum is 59.

The spelling of 28449486473 in words is "twenty-eight billion, four hundred forty-nine million, four hundred eighty-six thousand, four hundred seventy-three".