285478 has 8 divisors (see below), whose sum is σ = 437472. Its totient is φ = 139656.

The previous prime is 285473. The next prime is 285497. The reversal of 285478 is 874582.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1425 + ... + 1612.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

2²⁸⁵⁴⁷⁸ is an apocalyptic number.

285478 is a deficient number, since it is larger than the sum of its proper divisors (151994).

285478 is a wasteful number, since it uses less digits than its factorization.

285478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086.

The product of its digits is 17920, while the sum is 34.

The square root of 285478 is about 534.3014130620. The cubic root of 285478 is about 65.8452142562.

The spelling of 285478 in words is "two hundred eighty-five thousand, four hundred seventy-eight".