491217104 has 60 divisors (see below), whose sum is σ = 1100402784. Its totient is φ = 208086336.

The previous prime is 491217101. The next prime is 491217113. The reversal of 491217104 is 401712194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491217101) 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 in 11 ways as a sum of consecutive naturals, for example, 2163839 + ... + 2164065.

Almost surely, 2^491217104 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 491217104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550201392).

491217104 is an abundant number, since it is smaller than the sum of its proper divisors (609185680).

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

491217104 is a wasteful number, since it uses less digits than its factorization.

491217104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 491217104 is about 22163.4181479302. The cubic root of 491217104 is about 789.0257198468.

Adding to 491217104 its reverse (401712194), we get a palindrome (892929298).

The spelling of 491217104 in words is "four hundred ninety-one million, two hundred seventeen thousand, one hundred four".