27428339 has 2 divisors, whose sum is σ = 27428340. Its totient is φ = 27428338.

The previous prime is 27428299. The next prime is 27428341. The reversal of 27428339 is 93382472.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27428339 is a prime.

Together with 27428341, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27424339) 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, 13714169 + 13714170.

It is an arithmetic number, because the mean of its divisors is an integer number (13714170).

Almost surely, 2^27428339 is an apocalyptic number.

27428339 is a deficient number, since it is larger than the sum of its proper divisors (1).

27428339 is an equidigital number, since it uses as much as digits as its factorization.

27428339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 27428339 is about 5237.2071755851. The cubic root of 27428339 is about 301.5781245934.

The spelling of 27428339 in words is "twenty-seven million, four hundred twenty-eight thousand, three hundred thirty-nine".