28495891 has 2 divisors, whose sum is σ = 28495892. Its totient is φ = 28495890.

The previous prime is 28495889. The next prime is 28495897. The reversal of 28495891 is 19859482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28495891 - 2¹ = 28495889 is a prime.

Together with 28495889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28495897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14247945 + 14247946.

It is an arithmetic number, because the mean of its divisors is an integer number (14247946).

Almost surely, 2^28495891 is an apocalyptic number.

28495891 is a deficient number, since it is larger than the sum of its proper divisors (1).

28495891 is an equidigital number, since it uses as much as digits as its factorization.

28495891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 46.

The square root of 28495891 is about 5338.1542690334. The cubic root of 28495891 is about 305.4410567706.

The spelling of 28495891 in words is "twenty-eight million, four hundred ninety-five thousand, eight hundred ninety-one".