28915259 has 2 divisors, whose sum is σ = 28915260. Its totient is φ = 28915258.

The previous prime is 28915223. The next prime is 28915261. The reversal of 28915259 is 95251982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28915259 is a prime.

Together with 28915261, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1794749 and since 28915259 and 1794749 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28915459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14457629 + 14457630.

It is an arithmetic number, because the mean of its divisors is an integer number (14457630).

Almost surely, 2^28915259 is an apocalyptic number.

28915259 is a deficient number, since it is larger than the sum of its proper divisors (1).

28915259 is an equidigital number, since it uses as much as digits as its factorization.

28915259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 41.

The square root of 28915259 is about 5377.2910466145. The cubic root of 28915259 is about 306.9321363575.

The spelling of 28915259 in words is "twenty-eight million, nine hundred fifteen thousand, two hundred fifty-nine".