28580017 has 2 divisors, whose sum is σ = 28580018. Its totient is φ = 28580016.

The previous prime is 28580003. The next prime is 28580023. The reversal of 28580017 is 71008582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15555136 + 13024881 = 3944^2 + 3609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28580017 is a prime.

It is not a weakly prime, because it can be changed into another prime (28580917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14290008 + 14290009.

It is an arithmetic number, because the mean of its divisors is an integer number (14290009).

Almost surely, 2^28580017 is an apocalyptic number.

It is an amenable number.

28580017 is a deficient number, since it is larger than the sum of its proper divisors (1).

28580017 is an equidigital number, since it uses as much as digits as its factorization.

28580017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 28580017 is about 5346.0281518151. The cubic root of 28580017 is about 305.7413373676.

Adding to 28580017 its reverse (71008582), we get a palindrome (99588599).

The spelling of 28580017 in words is "twenty-eight million, five hundred eighty thousand, seventeen".