28271671 has 2 divisors, whose sum is σ = 28271672. Its totient is φ = 28271670.

The previous prime is 28271611. The next prime is 28271687. The reversal of 28271671 is 17617282.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28271671 - 2¹³ = 28263479 is a prime.

It is a super-2 number, since 2×28271671² = 1598574762264482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28271611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14135835 + 14135836.

It is an arithmetic number, because the mean of its divisors is an integer number (14135836).

Almost surely, 2^28271671 is an apocalyptic number.

28271671 is a deficient number, since it is larger than the sum of its proper divisors (1).

28271671 is an equidigital number, since it uses as much as digits as its factorization.

28271671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 34.

The square root of 28271671 is about 5317.1111517440. Note that the first 4 decimals coincide. The cubic root of 28271671 is about 304.6378250518.

The spelling of 28271671 in words is "twenty-eight million, two hundred seventy-one thousand, six hundred seventy-one".