284885 has 8 divisors (see below), whose sum is σ = 344736. Its totient is φ = 226000.

The previous prime is 284881. The next prime is 284897. The reversal of 284885 is 588482.

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

It is not a de Polignac number, because 284885 - 2² = 284881 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

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 284885.

It is not an unprimeable number, because it can be changed into a prime (284881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (43092).

2²⁸⁴⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

284885 is a deficient number, since it is larger than the sum of its proper divisors (59851).

284885 is a wasteful number, since it uses less digits than its factorization.

284885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483.

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

The square root of 284885 is about 533.7461943658. The cubic root of 284885 is about 65.7995910335.

It can be divided in two parts, 28 and 4885, that added together give a cube (4913 = 17³).

The spelling of 284885 in words is "two hundred eighty-four thousand, eight hundred eighty-five".