28271471 has 2 divisors, whose sum is σ = 28271472. Its totient is φ = 28271470.

The previous prime is 28271447. The next prime is 28271483. The reversal of 28271471 is 17417282.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28271471 - 2¹⁸ = 28009327 is a prime.

It is a super-3 number, since 3×28271471³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28271371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14135735 + 14135736.

It is an arithmetic number, because the mean of its divisors is an integer number (14135736).

Almost surely, 2^28271471 is an apocalyptic number.

28271471 is a deficient number, since it is larger than the sum of its proper divisors (1).

28271471 is an equidigital number, since it uses as much as digits as its factorization.

28271471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 32.

The square root of 28271471 is about 5317.0923445056. The cubic root of 28271471 is about 304.6371066918.

The spelling of 28271471 in words is "twenty-eight million, two hundred seventy-one thousand, four hundred seventy-one".