28003249 has 2 divisors, whose sum is σ = 28003250. Its totient is φ = 28003248.

The previous prime is 28003231. The next prime is 28003271. The reversal of 28003249 is 94230082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27720225 + 283024 = 5265^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 28003249 - 2¹¹ = 28001201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28003279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14001624 + 14001625.

It is an arithmetic number, because the mean of its divisors is an integer number (14001625).

Almost surely, 2^28003249 is an apocalyptic number.

It is an amenable number.

28003249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28003249 is an equidigital number, since it uses as much as digits as its factorization.

28003249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28003249 is about 5291.8096148671. The cubic root of 28003249 is about 303.6706418257.

The spelling of 28003249 in words is "twenty-eight million, three thousand, two hundred forty-nine".