285728711 has 2 divisors, whose sum is σ = 285728712. Its totient is φ = 285728710.

The previous prime is 285728699. The next prime is 285728717. The reversal of 285728711 is 117827582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285728711 is a prime.

It is a Sophie Germain 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 (285728717) 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, 142864355 + 142864356.

It is an arithmetic number, because the mean of its divisors is an integer number (142864356).

Almost surely, 2^285728711 is an apocalyptic number.

285728711 is a deficient number, since it is larger than the sum of its proper divisors (1).

285728711 is an equidigital number, since it uses as much as digits as its factorization.

285728711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 41.

The square root of 285728711 is about 16903.5117948904. The cubic root of 285728711 is about 658.6448402986.

The spelling of 285728711 in words is "two hundred eighty-five million, seven hundred twenty-eight thousand, seven hundred eleven".