28359239 has 2 divisors, whose sum is σ = 28359240. Its totient is φ = 28359238.

The previous prime is 28359223. The next prime is 28359241. The reversal of 28359239 is 93295382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28359239 - 2⁴ = 28359223 is a prime.

It is a Sophie Germain prime.

Together with 28359241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28359196 and 28359205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28350239) 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, 14179619 + 14179620.

It is an arithmetic number, because the mean of its divisors is an integer number (14179620).

Almost surely, 2^28359239 is an apocalyptic number.

28359239 is a deficient number, since it is larger than the sum of its proper divisors (1).

28359239 is an equidigital number, since it uses as much as digits as its factorization.

28359239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 28359239 is about 5325.3393319112. The cubic root of 28359239 is about 304.9520268541.

The spelling of 28359239 in words is "twenty-eight million, three hundred fifty-nine thousand, two hundred thirty-nine".