404685 has 36 divisors (see below), whose sum is σ = 776412. Its totient is φ = 194304.

The previous prime is 404671. The next prime is 404693. The reversal of 404685 is 586404.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 171396 = 483^2 + 414^2 .

It is not a de Polignac number, because 404685 - 2⁷ = 404557 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17584 + ... + 17606.

It is an arithmetic number, because the mean of its divisors is an integer number (21567).

2⁴⁰⁴⁶⁸⁵ is an apocalyptic number.

404685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404685 is a deficient number, since it is larger than the sum of its proper divisors (371727).

404685 is a wasteful number, since it uses less digits than its factorization.

404685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 404685 is about 636.1485675532. The cubic root of 404685 is about 73.9671756053.

It can be divided in two parts, 404 and 685, that added together give a square (1089 = 33²).

The spelling of 404685 in words is "four hundred four thousand, six hundred eighty-five".