28291259 has 2 divisors, whose sum is σ = 28291260. Its totient is φ = 28291258.

The previous prime is 28291253. The next prime is 28291279. The reversal of 28291259 is 95219282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28291259 - 2¹⁶ = 28225723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28291253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14145629 + 14145630.

It is an arithmetic number, because the mean of its divisors is an integer number (14145630).

Almost surely, 2^28291259 is an apocalyptic number.

28291259 is a deficient number, since it is larger than the sum of its proper divisors (1).

28291259 is an equidigital number, since it uses as much as digits as its factorization.

28291259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 28291259 is about 5318.9528104694. The cubic root of 28291259 is about 304.7081648171.

The spelling of 28291259 in words is "twenty-eight million, two hundred ninety-one thousand, two hundred fifty-nine".