285286661 has 6 divisors (see below), whose sum is σ = 313579686. Its totient is φ = 259351400.

The previous prime is 285286657. The next prime is 285286679. The reversal of 285286661 is 166682582.

It can be written as a sum of positive squares in only one way, i.e., 268632100 + 16654561 = 16390^2 + 4081^2 .

It is not a de Polignac number, because 285286661 - 2² = 285286657 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 (285286621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1178750 + ... + 1178991.

It is an arithmetic number, because the mean of its divisors is an integer number (52263281).

Almost surely, 2^285286661 is an apocalyptic number.

It is an amenable number.

285286661 is a deficient number, since it is larger than the sum of its proper divisors (28293025).

285286661 is a wasteful number, since it uses less digits than its factorization.

285286661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357763 (or 2357752 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 285286661 is about 16890.4310483777. The cubic root of 285286661 is about 658.3050025231.

The spelling of 285286661 in words is "two hundred eighty-five million, two hundred eighty-six thousand, six hundred sixty-one".