28755239 has 2 divisors, whose sum is σ = 28755240. Its totient is φ = 28755238.

The previous prime is 28755193. The next prime is 28755247. The reversal of 28755239 is 93255782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28755239 - 2²⁴ = 11978023 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28755196 and 28755205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28755439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14377619 + 14377620.

It is an arithmetic number, because the mean of its divisors is an integer number (14377620).

Almost surely, 2^28755239 is an apocalyptic number.

28755239 is a deficient number, since it is larger than the sum of its proper divisors (1).

28755239 is an equidigital number, since it uses as much as digits as its factorization.

28755239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 28755239 is about 5362.3911643967. The cubic root of 28755239 is about 306.3648907261.

The spelling of 28755239 in words is "twenty-eight million, seven hundred fifty-five thousand, two hundred thirty-nine".