285406 has 8 divisors (see below), whose sum is σ = 467064. Its totient is φ = 129720.

The previous prime is 285377. The next prime is 285421. The reversal of 285406 is 604582.

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

285406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6465 + ... + 6508.

It is an arithmetic number, because the mean of its divisors is an integer number (58383).

2²⁸⁵⁴⁰⁶ is an apocalyptic number.

285406 is a deficient number, since it is larger than the sum of its proper divisors (181658).

285406 is a wasteful number, since it uses less digits than its factorization.

285406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12986.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 285406 is about 534.2340311137. The cubic root of 285406 is about 65.8396782149.

Adding to 285406 its reverse (604582), we get a palindrome (889988).

The spelling of 285406 in words is "two hundred eighty-five thousand, four hundred six".