285517345 has 8 divisors (see below), whose sum is σ = 351881064. Its totient is φ = 222240384.

The previous prime is 285517327. The next prime is 285517357. The reversal of 285517345 is 543715582.

It can be written as a sum of positive squares in 4 ways, for example, as 73290721 + 212226624 = 8561^2 + 14568^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285517345 - 2¹¹ = 285515297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285517298 and 285517307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771484 + ... + 771853.

It is an arithmetic number, because the mean of its divisors is an integer number (43985133).

Almost surely, 2^285517345 is an apocalyptic number.

It is an amenable number.

285517345 is a deficient number, since it is larger than the sum of its proper divisors (66363719).

285517345 is a wasteful number, since it uses less digits than its factorization.

285517345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543379.

The product of its digits is 168000, while the sum is 40.

The square root of 285517345 is about 16897.2585054499. The cubic root of 285517345 is about 658.4823907886.

The spelling of 285517345 in words is "two hundred eighty-five million, five hundred seventeen thousand, three hundred forty-five".