491655328 has 36 divisors (see below), whose sum is σ = 1002529710. Its totient is φ = 237337856.

The previous prime is 491655323. The next prime is 491655349. The reversal of 491655328 is 823556194.

It can be written as a sum of positive squares in 3 ways, for example, as 460875024 + 30780304 = 21468^2 + 5548^2 .

It is not an unprimeable number, because it can be changed into a prime (491655323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17778 + ... + 36046.

Almost surely, 2^491655328 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 491655328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501264855).

491655328 is an abundant number, since it is smaller than the sum of its proper divisors (510874382).

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

491655328 is a wasteful number, since it uses less digits than its factorization.

491655328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18337 (or 18300 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The square root of 491655328 is about 22173.3021446964. The cubic root of 491655328 is about 789.2602849929.

The spelling of 491655328 in words is "four hundred ninety-one million, six hundred fifty-five thousand, three hundred twenty-eight".