404985 has 48 divisors (see below), whose sum is σ = 820800. Its totient is φ = 169344.

The previous prime is 404983. The next prime is 405001. The reversal of 404985 is 589404.

It is not a de Polignac number, because 404985 - 2¹ = 404983 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (404981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13951 + ... + 13979.

It is an arithmetic number, because the mean of its divisors is an integer number (17100).

2⁴⁰⁴⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

404985 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404985 is a wasteful number, since it uses less digits than its factorization.

404985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 404985 is about 636.3843178457. The cubic root of 404985 is about 73.9854488068.

The spelling of 404985 in words is "four hundred four thousand, nine hundred eighty-five".