404545664 has 32 divisors (see below), whose sum is σ = 807105600. Its totient is φ = 201978112.

The previous prime is 404545637. The next prime is 404545667. The reversal of 404545664 is 466545404.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×404545664² = 327314388522401792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404545667) 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, 105509 + ... + 109275.

It is an arithmetic number, because the mean of its divisors is an integer number (25222050).

Almost surely, 2^404545664 is an apocalyptic number.

It is an amenable number.

404545664 is a deficient number, since it is larger than the sum of its proper divisors (402559936).

404545664 is an equidigital number, since it uses as much as digits as its factorization.

404545664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620 (or 4608 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

The square root of 404545664 is about 20113.3205612599. The cubic root of 404545664 is about 739.5868548461.

The spelling of 404545664 in words is "four hundred four million, five hundred forty-five thousand, six hundred sixty-four".