285394 has 4 divisors (see below), whose sum is σ = 428094. Its totient is φ = 142696.

The previous prime is 285377. The next prime is 285421. The reversal of 285394 is 493582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 69169 = 465^2 + 263^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71347 + ... + 71350.

2²⁸⁵³⁹⁴ is an apocalyptic number.

285394 is a deficient number, since it is larger than the sum of its proper divisors (142700).

285394 is a wasteful number, since it uses less digits than its factorization.

285394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142699.

The product of its digits is 8640, while the sum is 31.

The square root of 285394 is about 534.2227999627. Note that the first 3 decimals coincide. The cubic root of 285394 is about 65.8387554508.

The spelling of 285394 in words is "two hundred eighty-five thousand, three hundred ninety-four".