28508903 has 2 divisors, whose sum is σ = 28508904. Its totient is φ = 28508902.

The previous prime is 28508861. The next prime is 28508947. The reversal of 28508903 is 30980582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28508903 - 2⁶ = 28508839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28508503) 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, 14254451 + 14254452.

It is an arithmetic number, because the mean of its divisors is an integer number (14254452).

Almost surely, 2^28508903 is an apocalyptic number.

28508903 is a deficient number, since it is larger than the sum of its proper divisors (1).

28508903 is an equidigital number, since it uses as much as digits as its factorization.

28508903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28508903 is about 5339.3729032537. The cubic root of 28508903 is about 305.4875405981.

The spelling of 28508903 in words is "twenty-eight million, five hundred eight thousand, nine hundred three".