491807216 has 10 divisors (see below), whose sum is σ = 952876512. Its totient is φ = 245903600.

The previous prime is 491807213. The next prime is 491807231. The reversal of 491807216 is 612708194.

It is a self number, because there is not a number n which added to its sum of digits gives 491807216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491807213) by changing a digit.

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 as a sum of consecutive naturals, namely, 15368960 + ... + 15368991.

Almost surely, 2^491807216 is an apocalyptic number.

It is an amenable number.

491807216 is a deficient number, since it is larger than the sum of its proper divisors (461069296).

491807216 is a wasteful number, since it uses less digits than its factorization.

491807216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30737959 (or 30737953 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 491807216 is about 22176.7269000635. The cubic root of 491807216 is about 789.3415525101.

The spelling of 491807216 in words is "four hundred ninety-one million, eight hundred seven thousand, two hundred sixteen".