491218176 has 72 divisors (see below), whose sum is σ = 1364247360. Its totient is φ = 156614656.

The previous prime is 491218159. The next prime is 491218207. The reversal of 491218176 is 671812194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3760 + ... + 31568.

It is an arithmetic number, because the mean of its divisors is an integer number (18947880).

Almost surely, 2^491218176 is an apocalyptic number.

491218176 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 491218176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (682123680).

491218176 is an abundant number, since it is smaller than the sum of its proper divisors (873029184).

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

491218176 is a wasteful number, since it uses less digits than its factorization.

491218176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27851 (or 27837 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 491218176 is about 22163.4423319123. The cubic root of 491218176 is about 789.0262938190.

The spelling of 491218176 in words is "four hundred ninety-one million, two hundred eighteen thousand, one hundred seventy-six".