285041789 has 4 divisors (see below), whose sum is σ = 287122524. Its totient is φ = 282961056.

The previous prime is 285041773. The next prime is 285041843. The reversal of 285041789 is 987140582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178436164 + 106605625 = 13358^2 + 10325^2 .

It is a cyclic number.

It is not a de Polignac number, because 285041789 - 2⁴ = 285041773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285041719) 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 in 3 ways as a sum of consecutive naturals, for example, 1040162 + ... + 1040435.

It is an arithmetic number, because the mean of its divisors is an integer number (71780631).

Almost surely, 2^285041789 is an apocalyptic number.

It is an amenable number.

285041789 is a deficient number, since it is larger than the sum of its proper divisors (2080735).

285041789 is a wasteful number, since it uses less digits than its factorization.

285041789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080734.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 285041789 is about 16883.1806541303. The cubic root of 285041789 is about 658.1165995025.

The spelling of 285041789 in words is "two hundred eighty-five million, forty-one thousand, seven hundred eighty-nine".