285327389 has 4 divisors (see below), whose sum is σ = 300344640. Its totient is φ = 270310140.

The previous prime is 285327353. The next prime is 285327409. The reversal of 285327389 is 983723582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285327389 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 (285327319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7508597 + ... + 7508634.

It is an arithmetic number, because the mean of its divisors is an integer number (75086160).

Almost surely, 2^285327389 is an apocalyptic number.

It is an amenable number.

285327389 is a deficient number, since it is larger than the sum of its proper divisors (15017251).

285327389 is a wasteful number, since it uses less digits than its factorization.

285327389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15017250.

The product of its digits is 725760, while the sum is 47.

The square root of 285327389 is about 16891.6366584177. The cubic root of 285327389 is about 658.3363279395.

The spelling of 285327389 in words is "two hundred eighty-five million, three hundred twenty-seven thousand, three hundred eighty-nine".