285329565 has 12 divisors (see below), whose sum is σ = 494571324. Its totient is φ = 152175744.

The previous prime is 285329563. The next prime is 285329587. The reversal of 285329565 is 565923582.

285329565 is a `hidden beast` number, since 2 + 85 + 3 + 2 + 9 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 174953529 + 110376036 = 13227^2 + 10506^2 .

It is not a de Polignac number, because 285329565 - 2¹ = 285329563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 6340657 = 285329565 / (2 + 8 + 5 + 3 + 2 + 9 + 5 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 285329565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285329563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3170284 + ... + 3170373.

It is an arithmetic number, because the mean of its divisors is an integer number (41214277).

Almost surely, 2^285329565 is an apocalyptic number.

It is an amenable number.

285329565 is a deficient number, since it is larger than the sum of its proper divisors (209241759).

285329565 is a wasteful number, since it uses less digits than its factorization.

285329565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340668 (or 6340665 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 285329565 is about 16891.7010688681. The cubic root of 285329565 is about 658.3380014980.

The spelling of 285329565 in words is "two hundred eighty-five million, three hundred twenty-nine thousand, five hundred sixty-five".