405244044 has 18 divisors (see below), whose sum is σ = 1024366980. Its totient is φ = 135081336.

The previous prime is 405244039. The next prime is 405244051. The reversal of 405244044 is 440442504.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 405243999 and 405244017.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5628354 + ... + 5628425.

Almost surely, 2^405244044 is an apocalyptic number.

It is an amenable number.

405244044 is an abundant number, since it is smaller than the sum of its proper divisors (619122936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405244044 is a wasteful number, since it uses less digits than its factorization.

405244044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11256789 (or 11256784 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 405244044 is about 20130.6742062952. The cubic root of 405244044 is about 740.0122009189.

Adding to 405244044 its reverse (440442504), we get a palindrome (845686548).

The spelling of 405244044 in words is "four hundred five million, two hundred forty-four thousand, forty-four".