491678216 has 32 divisors (see below), whose sum is σ = 978804000. Its totient is φ = 230743296.

The previous prime is 491678203. The next prime is 491678261. The reversal of 491678216 is 612876194.

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, 46775 + ... + 56313.

It is an arithmetic number, because the mean of its divisors is an integer number (30587625).

Almost surely, 2^491678216 is an apocalyptic number.

It is an amenable number.

491678216 is a deficient number, since it is larger than the sum of its proper divisors (487125784).

491678216 is a wasteful number, since it uses less digits than its factorization.

491678216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9941 (or 9937 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 491678216 is about 22173.8182548699. The cubic root of 491678216 is about 789.2725322646.

The spelling of 491678216 in words is "four hundred ninety-one million, six hundred seventy-eight thousand, two hundred sixteen".