28452089 has 2 divisors, whose sum is σ = 28452090. Its totient is φ = 28452088.

The previous prime is 28452077. The next prime is 28452113. The reversal of 28452089 is 98025482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19404025 + 9048064 = 4405^2 + 3008^2 .

It is a cyclic number.

It is not a de Polignac number, because 28452089 - 2⁸ = 28451833 is a prime.

It is a Chen prime.

It is equal to p_1767809 and since 28452089 and 1767809 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28452059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14226044 + 14226045.

It is an arithmetic number, because the mean of its divisors is an integer number (14226045).

Almost surely, 2^28452089 is an apocalyptic number.

It is an amenable number.

28452089 is a deficient number, since it is larger than the sum of its proper divisors (1).

28452089 is an equidigital number, since it uses as much as digits as its factorization.

28452089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28452089 is about 5334.0499622707. The cubic root of 28452089 is about 305.2844752469.

The spelling of 28452089 in words is "twenty-eight million, four hundred fifty-two thousand, eighty-nine".