404485865 has 24 divisors (see below), whose sum is σ = 561410880. Its totient is φ = 274057344.

The previous prime is 404485849. The next prime is 404485883. The reversal of 404485865 is 568584404.

It is a happy number.

It is not a de Polignac number, because 404485865 - 2⁴ = 404485849 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276506 + ... + 277964.

It is an arithmetic number, because the mean of its divisors is an integer number (23392120).

Almost surely, 2^404485865 is an apocalyptic number.

It is an amenable number.

404485865 is a deficient number, since it is larger than the sum of its proper divisors (156925015).

404485865 is an equidigital number, since it uses as much as digits as its factorization.

404485865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 44.

The square root of 404485865 is about 20111.8339541674. The cubic root of 404485865 is about 739.5504117136.

The spelling of 404485865 in words is "four hundred four million, four hundred eighty-five thousand, eight hundred sixty-five".