405404441 has 4 divisors (see below), whose sum is σ = 436589412. Its totient is φ = 374219472.

The previous prime is 405404437. The next prime is 405404459. The reversal of 405404441 is 144404504.

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 92256025 + 313148416 = 9605^2 + 17696^2 .

It is a cyclic number.

It is not a de Polignac number, because 405404441 - 2² = 405404437 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 405404441.

It is not an unprimeable number, because it can be changed into a prime (405404401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15592466 + ... + 15592491.

It is an arithmetic number, because the mean of its divisors is an integer number (109147353).

Almost surely, 2^405404441 is an apocalyptic number.

It is an amenable number.

405404441 is a deficient number, since it is larger than the sum of its proper divisors (31184971).

405404441 is a wasteful number, since it uses less digits than its factorization.

405404441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31184970.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 405404441 is about 20134.6577075450. The cubic root of 405404441 is about 740.1098211736.

Adding to 405404441 its reverse (144404504), we get a palindrome (549808945).

The spelling of 405404441 in words is "four hundred five million, four hundred four thousand, four hundred forty-one".