404465 has 8 divisors (see below), whose sum is σ = 497448. Its totient is φ = 315520.

The previous prime is 404461. The next prime is 404483. The reversal of 404465 is 564404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5041 + 399424 = 71^2 + 632^2 .

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

It is not a de Polignac number, because 404465 - 2² = 404461 is a prime.

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 404465.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404461) by changing a digit.

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, 782 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (62181).

2⁴⁰⁴⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

404465 is a deficient number, since it is larger than the sum of its proper divisors (92983).

404465 is a wasteful number, since it uses less digits than its factorization.

404465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 404465 is about 635.9756284639. The cubic root of 404465 is about 73.9537695171.

Adding to 404465 its reverse (564404), we get a palindrome (968869).

The spelling of 404465 in words is "four hundred four thousand, four hundred sixty-five".