404000305 has 8 divisors (see below), whose sum is σ = 501517800. Its totient is φ = 312055296.

The previous prime is 404000293. The next prime is 404000309. The reversal of 404000305 is 503000404.

It can be written as a sum of positive squares in 4 ways, for example, as 954529 + 403045776 = 977^2 + 20076^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404000305 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404000309) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1392960 + ... + 1393249.

It is an arithmetic number, because the mean of its divisors is an integer number (62689725).

Almost surely, 2^404000305 is an apocalyptic number.

It is an amenable number.

404000305 is a deficient number, since it is larger than the sum of its proper divisors (97517495).

404000305 is a wasteful number, since it uses less digits than its factorization.

404000305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786243.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 404000305 is about 20099.7588293989. The cubic root of 404000305 is about 739.2543652048.

Adding to 404000305 its reverse (503000404), we get a palindrome (907000709).

Subtracting 404000305 from its reverse (503000404), we obtain a palindrome (99000099).

The spelling of 404000305 in words is "four hundred four million, three hundred five", and thus it is an aban number.