491804786 has 16 divisors (see below), whose sum is σ = 805331808. Its totient is φ = 223392000.

The previous prime is 491804779. The next prime is 491804891. The reversal of 491804786 is 687408194.

It is a self number, because there is not a number n which added to its sum of digits gives 491804786.

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 7 ways as a sum of consecutive naturals, for example, 28241 + ... + 42203.

It is an arithmetic number, because the mean of its divisors is an integer number (50333238).

Almost surely, 2^491804786 is an apocalyptic number.

491804786 is a deficient number, since it is larger than the sum of its proper divisors (313527022).

491804786 is a wasteful number, since it uses less digits than its factorization.

491804786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15577.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 491804786 is about 22176.6721128306. The cubic root of 491804786 is about 789.3402524728.

The spelling of 491804786 in words is "four hundred ninety-one million, eight hundred four thousand, seven hundred eighty-six".