28334209 has 2 divisors, whose sum is σ = 28334210. Its totient is φ = 28334208.

The previous prime is 28334197. The next prime is 28334213. The reversal of 28334209 is 90243382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27793984 + 540225 = 5272^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 28334209 - 2¹⁷ = 28203137 is a prime.

It is not a weakly prime, because it can be changed into another prime (28334249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14167104 + 14167105.

It is an arithmetic number, because the mean of its divisors is an integer number (14167105).

Almost surely, 2^28334209 is an apocalyptic number.

It is an amenable number.

28334209 is a deficient number, since it is larger than the sum of its proper divisors (1).

28334209 is an equidigital number, since it uses as much as digits as its factorization.

28334209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28334209 is about 5322.9887281489. The cubic root of 28334209 is about 304.8622830736.

The spelling of 28334209 in words is "twenty-eight million, three hundred thirty-four thousand, two hundred nine".