28473655447 has 2 divisors, whose sum is σ = 28473655448. Its totient is φ = 28473655446.

The previous prime is 28473655433. The next prime is 28473655459. The reversal of 28473655447 is 74455637482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28473655447 - 2¹¹ = 28473653399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28473655547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14236827723 + 14236827724.

It is an arithmetic number, because the mean of its divisors is an integer number (14236827724).

Almost surely, 2^28473655447 is an apocalyptic number.

28473655447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28473655447 is an equidigital number, since it uses as much as digits as its factorization.

28473655447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22579200, while the sum is 55.

The spelling of 28473655447 in words is "twenty-eight billion, four hundred seventy-three million, six hundred fifty-five thousand, four hundred forty-seven".