28929839 has 2 divisors, whose sum is σ = 28929840. Its totient is φ = 28929838.

The previous prime is 28929833. The next prime is 28929847. The reversal of 28929839 is 93892982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28929839 - 2²⁰ = 27881263 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 (28929833) 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, 14464919 + 14464920.

It is an arithmetic number, because the mean of its divisors is an integer number (14464920).

Almost surely, 2^28929839 is an apocalyptic number.

28929839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28929839 is an equidigital number, since it uses as much as digits as its factorization.

28929839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 50.

The square root of 28929839 is about 5378.6465769745. The cubic root of 28929839 is about 306.9837160281.

The spelling of 28929839 in words is "twenty-eight million, nine hundred twenty-nine thousand, eight hundred thirty-nine".