404666636 has 48 divisors (see below), whose sum is σ = 832191360. Its totient is φ = 170190720.

The previous prime is 404666621. The next prime is 404666641. The reversal of 404666636 is 636666404.

It is a junction number, because it is equal to n+sod(n) for n = 404666593 and 404666602.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 30320 + ... + 41576.

It is an arithmetic number, because the mean of its divisors is an integer number (17337320).

Almost surely, 2^404666636 is an apocalyptic number.

It is an amenable number.

404666636 is an abundant number, since it is smaller than the sum of its proper divisors (427524724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404666636 is a wasteful number, since it uses less digits than its factorization.

404666636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11334 (or 11332 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 41.

The square root of 404666636 is about 20116.3275972529. The cubic root of 404666636 is about 739.6605674842.

The spelling of 404666636 in words is "four hundred four million, six hundred sixty-six thousand, six hundred thirty-six".