404085 has 32 divisors (see below), whose sum is σ = 737280. Its totient is φ = 187200.

The previous prime is 404081. The next prime is 404099. The reversal of 404085 is 580404.

It is not a de Polignac number, because 404085 - 2² = 404081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5076 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (23040).

2⁴⁰⁴⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

404085 is a deficient number, since it is larger than the sum of its proper divisors (333195).

404085 is a wasteful number, since it uses less digits than its factorization.

404085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 404085 is about 635.6768046736. The cubic root of 404085 is about 73.9306020920.

Adding to 404085 its reverse (580404), we get a palindrome (984489).

The spelling of 404085 in words is "four hundred four thousand, eighty-five".