28966571 has 2 divisors, whose sum is σ = 28966572. Its totient is φ = 28966570.

The previous prime is 28966549. The next prime is 28966577. The reversal of 28966571 is 17566982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28966571 - 2¹⁸ = 28704427 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28966577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14483285 + 14483286.

It is an arithmetic number, because the mean of its divisors is an integer number (14483286).

Almost surely, 2^28966571 is an apocalyptic number.

28966571 is a deficient number, since it is larger than the sum of its proper divisors (1).

28966571 is an equidigital number, since it uses as much as digits as its factorization.

28966571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 28966571 is about 5382.0601074310. The cubic root of 28966571 is about 307.1135860539.

The spelling of 28966571 in words is "twenty-eight million, nine hundred sixty-six thousand, five hundred seventy-one".