28381259 has 2 divisors, whose sum is σ = 28381260. Its totient is φ = 28381258.

The previous prime is 28381253. The next prime is 28381261. The reversal of 28381259 is 95218382.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28381259 is a prime.

Together with 28381261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28381253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14190629 + 14190630.

It is an arithmetic number, because the mean of its divisors is an integer number (14190630).

Almost surely, 2^28381259 is an apocalyptic number.

28381259 is a deficient number, since it is larger than the sum of its proper divisors (1).

28381259 is an equidigital number, since it uses as much as digits as its factorization.

28381259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 28381259 is about 5327.4064046213. The cubic root of 28381259 is about 305.0309347822.

The spelling of 28381259 in words is "twenty-eight million, three hundred eighty-one thousand, two hundred fifty-nine".