28209359 has 2 divisors, whose sum is σ = 28209360. Its totient is φ = 28209358.

The previous prime is 28209347. The next prime is 28209397. The reversal of 28209359 is 95390282.

It is an a-pointer prime, because the next prime (28209397) can be obtained adding 28209359 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28209359 - 2⁴ = 28209343 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 (28209329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14104679 + 14104680.

It is an arithmetic number, because the mean of its divisors is an integer number (14104680).

Almost surely, 2^28209359 is an apocalyptic number.

28209359 is a deficient number, since it is larger than the sum of its proper divisors (1).

28209359 is an equidigital number, since it uses as much as digits as its factorization.

28209359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 28209359 is about 5311.2483466695. The cubic root of 28209359 is about 304.4138487209.

The spelling of 28209359 in words is "twenty-eight million, two hundred nine thousand, three hundred fifty-nine".