28906259 has 2 divisors, whose sum is σ = 28906260. Its totient is φ = 28906258.

The previous prime is 28906249. The next prime is 28906261. The reversal of 28906259 is 95260982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28906259 is a prime.

It is a Sophie Germain prime.

Together with 28906261, 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 (28906219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14453129 + 14453130.

It is an arithmetic number, because the mean of its divisors is an integer number (14453130).

Almost surely, 2^28906259 is an apocalyptic number.

28906259 is a deficient number, since it is larger than the sum of its proper divisors (1).

28906259 is an equidigital number, since it uses as much as digits as its factorization.

28906259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 28906259 is about 5376.4541288846. The cubic root of 28906259 is about 306.9002883993.

The spelling of 28906259 in words is "twenty-eight million, nine hundred six thousand, two hundred fifty-nine".