285224 has 16 divisors (see below), whose sum is σ = 541620. Its totient is φ = 140800.

The previous prime is 285221. The next prime is 285227. The reversal of 285224 is 422582.

It is an interprime number because it is at equal distance from previous prime (285221) and next prime (285227).

It can be written as a sum of positive squares in 2 ways, for example, as 268324 + 16900 = 518^2 + 130^2 .

It is a super-3 number, since 3×285224³ = 69611253335158272, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 285224.

It is not an unprimeable number, because it can be changed into a prime (285221) 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 3 ways as a sum of consecutive naturals, for example, 632 + ... + 984.

2²⁸⁵²²⁴ is an apocalyptic number.

It is an amenable number.

285224 is a deficient number, since it is larger than the sum of its proper divisors (256396).

285224 is a wasteful number, since it uses less digits than its factorization.

285224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 456 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 285224 is about 534.0636666166. The cubic root of 285224 is about 65.8256801800.

The spelling of 285224 in words is "two hundred eighty-five thousand, two hundred twenty-four".