285008 has 20 divisors (see below), whose sum is σ = 565440. Its totient is φ = 139104.

The previous prime is 285007. The next prime is 285023. The reversal of 285008 is 800582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285007) 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, 563 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (28272).

2²⁸⁵⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

285008 is a deficient number, since it is larger than the sum of its proper divisors (280432).

285008 is a wasteful number, since it uses less digits than its factorization.

285008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 285008 is about 533.8614052355. The cubic root of 285008 is about 65.8090593982.

The spelling of 285008 in words is "two hundred eighty-five thousand, eight".