28036289 has 2 divisors, whose sum is σ = 28036290. Its totient is φ = 28036288.

The previous prime is 28036279. The next prime is 28036297. The reversal of 28036289 is 98263082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 8526400 = 4417^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 28036289 - 2⁴ = 28036273 is a prime.

It is not a weakly prime, because it can be changed into another prime (28036219) 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, 14018144 + 14018145.

It is an arithmetic number, because the mean of its divisors is an integer number (14018145).

Almost surely, 2^28036289 is an apocalyptic number.

It is an amenable number.

28036289 is a deficient number, since it is larger than the sum of its proper divisors (1).

28036289 is an equidigital number, since it uses as much as digits as its factorization.

28036289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28036289 is about 5294.9305000160. The cubic root of 28036289 is about 303.7900248137.

The spelling of 28036289 in words is "twenty-eight million, thirty-six thousand, two hundred eighty-nine".