28912571 has 2 divisors, whose sum is σ = 28912572. Its totient is φ = 28912570.

The previous prime is 28912531. The next prime is 28912573. The reversal of 28912571 is 17521982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28912571 - 2¹⁴ = 28896187 is a prime.

Together with 28912573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28912573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14456285 + 14456286.

It is an arithmetic number, because the mean of its divisors is an integer number (14456286).

Almost surely, 2^28912571 is an apocalyptic number.

28912571 is a deficient number, since it is larger than the sum of its proper divisors (1).

28912571 is an equidigital number, since it uses as much as digits as its factorization.

28912571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 28912571 is about 5377.0411008286. The cubic root of 28912571 is about 306.9226251262.

The spelling of 28912571 in words is "twenty-eight million, nine hundred twelve thousand, five hundred seventy-one".