28458839 has 2 divisors, whose sum is σ = 28458840. Its totient is φ = 28458838.

The previous prime is 28458821. The next prime is 28458841. The reversal of 28458839 is 93885482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28458839 - 2²⁴ = 11681623 is a prime.

Together with 28458841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28458793 and 28458802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28458139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14229419 + 14229420.

It is an arithmetic number, because the mean of its divisors is an integer number (14229420).

Almost surely, 2^28458839 is an apocalyptic number.

28458839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28458839 is an equidigital number, since it uses as much as digits as its factorization.

28458839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 47.

The square root of 28458839 is about 5334.6826522297. The cubic root of 28458839 is about 305.3086153288.

The spelling of 28458839 in words is "twenty-eight million, four hundred fifty-eight thousand, eight hundred thirty-nine".