491307876 has 96 divisors (see below), whose sum is σ = 1345720320. Its totient is φ = 154696608.

The previous prime is 491307829. The next prime is 491307979. The reversal of 491307876 is 678703194.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 31 ways as a sum of consecutive naturals, for example, 204981 + ... + 207363.

It is an arithmetic number, because the mean of its divisors is an integer number (14017920).

Almost surely, 2^491307876 is an apocalyptic number.

491307876 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491307876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672860160).

491307876 is an abundant number, since it is smaller than the sum of its proper divisors (854412444).

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

491307876 is a wasteful number, since it uses less digits than its factorization.

491307876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502 (or 2494 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 491307876 is about 22165.4658421609. The cubic root of 491307876 is about 789.0743182030.

The spelling of 491307876 in words is "four hundred ninety-one million, three hundred seven thousand, eight hundred seventy-six".