28859839 has 2 divisors, whose sum is σ = 28859840. Its totient is φ = 28859838.

The previous prime is 28859813. The next prime is 28859849. The reversal of 28859839 is 93895882.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28859839 - 2⁵ = 28859807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28859849) 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, 14429919 + 14429920.

It is an arithmetic number, because the mean of its divisors is an integer number (14429920).

Almost surely, 2^28859839 is an apocalyptic number.

28859839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28859839 is an equidigital number, since it uses as much as digits as its factorization.

28859839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 52.

The square root of 28859839 is about 5372.1354227160. The cubic root of 28859839 is about 306.7359186440.

The spelling of 28859839 in words is "twenty-eight million, eight hundred fifty-nine thousand, eight hundred thirty-nine".