28540339 has 2 divisors, whose sum is σ = 28540340. Its totient is φ = 28540338.

The previous prime is 28540333. The next prime is 28540349. The reversal of 28540339 is 93304582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28540339 - 2⁵ = 28540307 is a prime.

It is not a weakly prime, because it can be changed into another prime (28540333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14270169 + 14270170.

It is an arithmetic number, because the mean of its divisors is an integer number (14270170).

Almost surely, 2^28540339 is an apocalyptic number.

28540339 is a deficient number, since it is larger than the sum of its proper divisors (1).

28540339 is an equidigital number, since it uses as much as digits as its factorization.

28540339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 28540339 is about 5342.3158835846. The cubic root of 28540339 is about 305.5997836486.

The spelling of 28540339 in words is "twenty-eight million, five hundred forty thousand, three hundred thirty-nine".