285909229 has 4 divisors (see below), whose sum is σ = 287489020. Its totient is φ = 284329440.

The previous prime is 285909227. The next prime is 285909233. The reversal of 285909229 is 922909582.

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 118853604 + 167055625 = 10902^2 + 12925^2 .

It is a cyclic number.

It is not a de Polignac number, because 285909229 - 2¹ = 285909227 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 (285909227) 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, 789624 + ... + 789985.

It is an arithmetic number, because the mean of its divisors is an integer number (71872255).

Almost surely, 2^285909229 is an apocalyptic number.

It is an amenable number.

285909229 is a deficient number, since it is larger than the sum of its proper divisors (1579791).

285909229 is a wasteful number, since it uses less digits than its factorization.

285909229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579790.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 285909229 is about 16908.8506114402. The cubic root of 285909229 is about 658.7835175526.

The spelling of 285909229 in words is "two hundred eighty-five million, nine hundred nine thousand, two hundred twenty-nine".