491840512 has 44 divisors (see below), whose sum is σ = 987775756. Its totient is φ = 244776960.

The previous prime is 491840497. The next prime is 491840543. The reversal of 491840512 is 215048194.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 364962816 + 126877696 = 19104^2 + 11264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245788 + ... + 247780.

It is an arithmetic number, because the mean of its divisors is an integer number (22449449).

Almost surely, 2^491840512 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 491840512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493887878).

491840512 is an abundant number, since it is smaller than the sum of its proper divisors (495935244).

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

491840512 is a wasteful number, since it uses less digits than its factorization.

491840512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 491840512 is about 22177.4775842520. The cubic root of 491840512 is about 789.3593652643.

The spelling of 491840512 in words is "four hundred ninety-one million, eight hundred forty thousand, five hundred twelve".