404666985 has 32 divisors (see below), whose sum is σ = 667457280. Its totient is φ = 209260800.

The previous prime is 404666981. The next prime is 404666987. The reversal of 404666985 is 589666404.

It is a happy number.

It is not a de Polignac number, because 404666985 - 2² = 404666981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404666981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61851 + ... + 68079.

It is an arithmetic number, because the mean of its divisors is an integer number (20858040).

Almost surely, 2^404666985 is an apocalyptic number.

It is an amenable number.

404666985 is a deficient number, since it is larger than the sum of its proper divisors (262790295).

404666985 is a wasteful number, since it uses less digits than its factorization.

404666985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6369.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The square root of 404666985 is about 20116.3362717966. The cubic root of 404666985 is about 739.6607801214.

The spelling of 404666985 in words is "four hundred four million, six hundred sixty-six thousand, nine hundred eighty-five".