28575839 has 2 divisors, whose sum is σ = 28575840. Its totient is φ = 28575838.

The previous prime is 28575763. The next prime is 28575857. The reversal of 28575839 is 93857582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28575839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28575793 and 28575802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28572839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14287919 + 14287920.

It is an arithmetic number, because the mean of its divisors is an integer number (14287920).

Almost surely, 2^28575839 is an apocalyptic number.

28575839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28575839 is an equidigital number, since it uses as much as digits as its factorization.

28575839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 28575839 is about 5345.6373801447. The cubic root of 28575839 is about 305.7264382681.

The spelling of 28575839 in words is "twenty-eight million, five hundred seventy-five thousand, eight hundred thirty-nine".