404485 has 4 divisors (see below), whose sum is σ = 485388. Its totient is φ = 323584.

The previous prime is 404483. The next prime is 404489. The reversal of 404485 is 584404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 268324 + 136161 = 518^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 404485 - 2¹ = 404483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40444 + ... + 40453.

It is an arithmetic number, because the mean of its divisors is an integer number (121347).

2⁴⁰⁴⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

404485 is a deficient number, since it is larger than the sum of its proper divisors (80903).

404485 is an equidigital number, since it uses as much as digits as its factorization.

404485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80902.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 404485 is about 635.9913521425. The cubic root of 404485 is about 73.9549884533.

Adding to 404485 its reverse (584404), we get a palindrome (988889).

The spelling of 404485 in words is "four hundred four thousand, four hundred eighty-five".