404285 has 8 divisors (see below), whose sum is σ = 554496. Its totient is φ = 277200.

The previous prime is 404273. The next prime is 404291. The reversal of 404285 is 582404.

404285 = 90² + 91² + ... + 124².

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

It is not a de Polignac number, because 404285 - 2⁴ = 404269 is a prime.

It is a super-2 number, since 2×404285² = 326892722450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404285.

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 404285.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 5741 + ... + 5810.

It is an arithmetic number, because the mean of its divisors is an integer number (69312).

2⁴⁰⁴²⁸⁵ is an apocalyptic number.

It is an amenable number.

404285 is a deficient number, since it is larger than the sum of its proper divisors (150211).

404285 is a wasteful number, since it uses less digits than its factorization.

404285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 404285 is about 635.8340978589. The cubic root of 404285 is about 73.9427972833.

Adding to 404285 its reverse (582404), we get a palindrome (986689).

The spelling of 404285 in words is "four hundred four thousand, two hundred eighty-five".