28589591 has 2 divisors, whose sum is σ = 28589592. Its totient is φ = 28589590.

The previous prime is 28589581. The next prime is 28589593. The reversal of 28589591 is 19598582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28589591 - 2⁶ = 28589527 is a prime.

It is a Sophie Germain prime.

Together with 28589593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28589593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14294795 + 14294796.

It is an arithmetic number, because the mean of its divisors is an integer number (14294796).

Almost surely, 2^28589591 is an apocalyptic number.

28589591 is a deficient number, since it is larger than the sum of its proper divisors (1).

28589591 is an equidigital number, since it uses as much as digits as its factorization.

28589591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 47.

The square root of 28589591 is about 5346.9235079623. The cubic root of 28589591 is about 305.7754735821.

The spelling of 28589591 in words is "twenty-eight million, five hundred eighty-nine thousand, five hundred ninety-one".