491173260 has 96 divisors (see below), whose sum is σ = 1409026752. Its totient is φ = 127795200.

The previous prime is 491173259. The next prime is 491173297. The reversal of 491173260 is 62371194.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816960 + ... + 817560.

It is an arithmetic number, because the mean of its divisors is an integer number (14677362).

Almost surely, 2^491173260 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491173260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704513376).

491173260 is an abundant number, since it is smaller than the sum of its proper divisors (917853492).

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

491173260 is a wasteful number, since it uses less digits than its factorization.

491173260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 491173260 is about 22162.4290184989. The cubic root of 491173260 is about 789.0022440946.

The spelling of 491173260 in words is "four hundred ninety-one million, one hundred seventy-three thousand, two hundred sixty".