28028899 has 2 divisors, whose sum is σ = 28028900. Its totient is φ = 28028898.

The previous prime is 28028893. The next prime is 28028909. The reversal of 28028899 is 99882082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28028899 - 2⁹ = 28028387 is a prime.

It is not a weakly prime, because it can be changed into another prime (28028893) 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, 14014449 + 14014450.

It is an arithmetic number, because the mean of its divisors is an integer number (14014450).

Almost surely, 2^28028899 is an apocalyptic number.

28028899 is a deficient number, since it is larger than the sum of its proper divisors (1).

28028899 is an equidigital number, since it uses as much as digits as its factorization.

28028899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 28028899 is about 5294.2326167255. The cubic root of 28028899 is about 303.7633307725.

The spelling of 28028899 in words is "twenty-eight million, twenty-eight thousand, eight hundred ninety-nine".