491809336 has 16 divisors (see below), whose sum is σ = 923353200. Its totient is φ = 245581824.

The previous prime is 491809273. The next prime is 491809349. The reversal of 491809336 is 633908194.

It is a junction number, because it is equal to n+sod(n) for n = 491809292 and 491809301.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 33820 + ... + 46123.

It is an arithmetic number, because the mean of its divisors is an integer number (57709575).

Almost surely, 2^491809336 is an apocalyptic number.

It is an amenable number.

491809336 is a deficient number, since it is larger than the sum of its proper divisors (431543864).

491809336 is a wasteful number, since it uses less digits than its factorization.

491809336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80718 (or 80714 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 491809336 is about 22176.7746978680. The cubic root of 491809336 is about 789.3426866955.

The spelling of 491809336 in words is "four hundred ninety-one million, eight hundred nine thousand, three hundred thirty-six".