491860512 has 240 divisors, whose sum is σ = 1700721792. Its totient is φ = 137479680.

The previous prime is 491860493. The next prime is 491860513. The reversal of 491860512 is 215068194.

491860512 is a `hidden beast` number, since 49 + 1 + 8 + 605 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (491860513) 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 39 ways as a sum of consecutive naturals, for example, 369993 + ... + 371319.

Almost surely, 2^491860512 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 491860512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850360896).

491860512 is an abundant number, since it is smaller than the sum of its proper divisors (1208861280).

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

491860512 is a wasteful number, since it uses less digits than its factorization.

491860512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 491860512 is about 22177.9284875752. The cubic root of 491860512 is about 789.3700645140.

The spelling of 491860512 in words is "four hundred ninety-one million, eight hundred sixty thousand, five hundred twelve".