28715417 has 2 divisors, whose sum is σ = 28715418. Its totient is φ = 28715416.

The previous prime is 28715413. The next prime is 28715419. The reversal of 28715417 is 71451782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26822041 + 1893376 = 5179^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 28715417 - 2² = 28715413 is a prime.

Together with 28715419, 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 (28715413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14357708 + 14357709.

It is an arithmetic number, because the mean of its divisors is an integer number (14357709).

Almost surely, 2^28715417 is an apocalyptic number.

It is an amenable number.

28715417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28715417 is an equidigital number, since it uses as much as digits as its factorization.

28715417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 35.

The square root of 28715417 is about 5358.6767956278. The cubic root of 28715417 is about 306.2234011606.

The spelling of 28715417 in words is "twenty-eight million, seven hundred fifteen thousand, four hundred seventeen".