28135339 has 2 divisors, whose sum is σ = 28135340. Its totient is φ = 28135338.

The previous prime is 28135337. The next prime is 28135361. The reversal of 28135339 is 93353182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28135339 - 2¹ = 28135337 is a prime.

Together with 28135337, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28135337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14067669 + 14067670.

It is an arithmetic number, because the mean of its divisors is an integer number (14067670).

Almost surely, 2^28135339 is an apocalyptic number.

28135339 is a deficient number, since it is larger than the sum of its proper divisors (1).

28135339 is an equidigital number, since it uses as much as digits as its factorization.

28135339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 28135339 is about 5304.2755396001. The cubic root of 28135339 is about 304.1473597386.

The spelling of 28135339 in words is "twenty-eight million, one hundred thirty-five thousand, three hundred thirty-nine".