28449486437 has 2 divisors, whose sum is σ = 28449486438. Its totient is φ = 28449486436.

The previous prime is 28449486421. The next prime is 28449486473. The reversal of 28449486437 is 73468494482.

Together with next prime (28449486473) 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., 19961733796 + 8487752641 = 141286^2 + 92129^2 .

It is a cyclic number.

It is not a de Polignac number, because 28449486437 - 2⁴ = 28449486421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28449486407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14224743218 + 14224743219.

It is an arithmetic number, because the mean of its divisors is an integer number (14224743219).

Almost surely, 2^28449486437 is an apocalyptic number.

It is an amenable number.

28449486437 is a deficient number, since it is larger than the sum of its proper divisors (1).

28449486437 is an equidigital number, since it uses as much as digits as its factorization.

28449486437 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 28449486437 in words is "twenty-eight billion, four hundred forty-nine million, four hundred eighty-six thousand, four hundred thirty-seven".