405044 has 12 divisors (see below), whose sum is σ = 716100. Its totient is φ = 200448.

The previous prime is 405037. The next prime is 405047. The reversal of 405044 is 440504.

405044 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 115600 + 289444 = 340^2 + 538^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405047) by changing a digit.

405044 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29 + ... + 900.

It is an arithmetic number, because the mean of its divisors is an integer number (59675).

2⁴⁰⁵⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

405044 is a deficient number, since it is larger than the sum of its proper divisors (311056).

405044 is a wasteful number, since it uses less digits than its factorization.

405044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 405044 is about 636.4306717939. The cubic root of 405044 is about 73.9890414744.

Adding to 405044 its reverse (440504), we get a palindrome (845548).

The spelling of 405044 in words is "four hundred five thousand, forty-four".