28295117 has 2 divisors, whose sum is σ = 28295118. Its totient is φ = 28295116.

The previous prime is 28295107. The next prime is 28295119. The reversal of 28295117 is 71159282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26275876 + 2019241 = 5126^2 + 1421^2 .

It is a cyclic number.

It is not a de Polignac number, because 28295117 - 2⁴ = 28295101 is a prime.

It is a super-2 number, since 2×28295117² = 1601227292087378, which contains 22 as substring.

Together with 28295119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28295119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14147558 + 14147559.

It is an arithmetic number, because the mean of its divisors is an integer number (14147559).

Almost surely, 2^28295117 is an apocalyptic number.

It is an amenable number.

28295117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28295117 is an equidigital number, since it uses as much as digits as its factorization.

28295117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 35.

The square root of 28295117 is about 5319.3154634784. The cubic root of 28295117 is about 304.7220149215.

The spelling of 28295117 in words is "twenty-eight million, two hundred ninety-five thousand, one hundred seventeen".