285728717 has 2 divisors, whose sum is σ = 285728718. Its totient is φ = 285728716.

The previous prime is 285728711. The next prime is 285728761. The reversal of 285728717 is 717827582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224670121 + 61058596 = 14989^2 + 7814^2 .

It is a cyclic number.

It is not a de Polignac number, because 285728717 - 2⁸ = 285728461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285728711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142864358 + 142864359.

It is an arithmetic number, because the mean of its divisors is an integer number (142864359).

Almost surely, 2^285728717 is an apocalyptic number.

It is an amenable number.

285728717 is a deficient number, since it is larger than the sum of its proper divisors (1).

285728717 is an equidigital number, since it uses as much as digits as its factorization.

285728717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 439040, while the sum is 47.

The square root of 285728717 is about 16903.5119723683. The cubic root of 285728717 is about 658.6448449089.

The spelling of 285728717 in words is "two hundred eighty-five million, seven hundred twenty-eight thousand, seven hundred seventeen".