491140512 has 72 divisors (see below), whose sum is σ = 1416411360. Its totient is φ = 161400960.

The previous prime is 491140499. The next prime is 491140513. The reversal of 491140512 is 215041194.

491140512 is a `hidden beast` number, since 4 + 9 + 1 + 140 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (491140513) 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, 8439 + ... + 32457.

It is an arithmetic number, because the mean of its divisors is an integer number (19672380).

Almost surely, 2^491140512 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 491140512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708205680).

491140512 is an abundant number, since it is smaller than the sum of its proper divisors (925270848).

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

491140512 is a wasteful number, since it uses less digits than its factorization.

491140512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24106 (or 24095 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 491140512 is about 22161.6901882505. The cubic root of 491140512 is about 788.9847086532.

The spelling of 491140512 in words is "four hundred ninety-one million, one hundred forty thousand, five hundred twelve".