28259771 has 2 divisors, whose sum is σ = 28259772. Its totient is φ = 28259770.

The previous prime is 28259753. The next prime is 28259773. The reversal of 28259771 is 17795282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28259771 - 2²² = 24065467 is a prime.

It is a super-2 number, since 2×28259771² = 1597229313944882, which contains 22 as substring.

Together with 28259773, 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 (28259773) 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, 14129885 + 14129886.

It is an arithmetic number, because the mean of its divisors is an integer number (14129886).

Almost surely, 2^28259771 is an apocalyptic number.

28259771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28259771 is an equidigital number, since it uses as much as digits as its factorization.

28259771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 41.

The square root of 28259771 is about 5315.9920052611. The cubic root of 28259771 is about 304.5950767370.

The spelling of 28259771 in words is "twenty-eight million, two hundred fifty-nine thousand, seven hundred seventy-one".