405044013 has 16 divisors (see below), whose sum is σ = 589522752. Its totient is φ = 245328000.

The previous prime is 405043993. The next prime is 405044039. The reversal of 405044013 is 310440504.

It is not a de Polignac number, because 405044013 - 2⁸ = 405043757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405044063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72583 + ... + 77963.

It is an arithmetic number, because the mean of its divisors is an integer number (36845172).

Almost surely, 2^405044013 is an apocalyptic number.

It is an amenable number.

405044013 is a deficient number, since it is larger than the sum of its proper divisors (184478739).

405044013 is a wasteful number, since it uses less digits than its factorization.

405044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7676.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 405044013 is about 20125.7052795672. The cubic root of 405044013 is about 739.8904226597.

Adding to 405044013 its reverse (310440504), we get a palindrome (715484517).

The spelling of 405044013 in words is "four hundred five million, forty-four thousand, thirteen".