285884 has 6 divisors (see below), whose sum is σ = 500304. Its totient is φ = 142940.

The previous prime is 285871. The next prime is 285937. The reversal of 285884 is 488582.

It is a super-2 number, since 2×285884² = 163459322912, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285884.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35732 + ... + 35739.

It is an arithmetic number, because the mean of its divisors is an integer number (83384).

2²⁸⁵⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

285884 is a deficient number, since it is larger than the sum of its proper divisors (214420).

285884 is a wasteful number, since it uses less digits than its factorization.

285884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71475 (or 71473 counting only the distinct ones).

The product of its digits is 20480, while the sum is 35.

The square root of 285884 is about 534.6812134347. The cubic root of 285884 is about 65.8764139679.

The spelling of 285884 in words is "two hundred eighty-five thousand, eight hundred eighty-four".