404644441 has 2 divisors, whose sum is σ = 404644442. Its totient is φ = 404644440.

The previous prime is 404644439. The next prime is 404644531. The reversal of 404644441 is 144446404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249766416 + 154878025 = 15804^2 + 12445^2 .

It is a cyclic number.

It is not a de Polignac number, because 404644441 - 2¹ = 404644439 is a prime.

Together with 404644439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (404674441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202322220 + 202322221.

It is an arithmetic number, because the mean of its divisors is an integer number (202322221).

Almost surely, 2^404644441 is an apocalyptic number.

It is an amenable number.

404644441 is a deficient number, since it is larger than the sum of its proper divisors (1).

404644441 is an equidigital number, since it uses as much as digits as its factorization.

404644441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 31.

The square root of 404644441 is about 20115.7759233891. The cubic root of 404644441 is about 739.6470443642.

The spelling of 404644441 in words is "four hundred four million, six hundred forty-four thousand, four hundred forty-one".