491843860 has 12 divisors (see below), whose sum is σ = 1032872148. Its totient is φ = 196737536.

The previous prime is 491843819. The next prime is 491843873. The reversal of 491843860 is 68348194.

It can be written as a sum of positive squares in 2 ways, for example, as 127644804 + 364199056 = 11298^2 + 19084^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12296077 + ... + 12296116.

It is an arithmetic number, because the mean of its divisors is an integer number (86072679).

Almost surely, 2^491843860 is an apocalyptic number.

It is an amenable number.

491843860 is an abundant number, since it is smaller than the sum of its proper divisors (541028288).

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

491843860 is a wasteful number, since it uses less digits than its factorization.

491843860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24592202 (or 24592200 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 491843860 is about 22177.5530661072. The cubic root of 491843860 is about 789.3611563390.

The spelling of 491843860 in words is "four hundred ninety-one million, eight hundred forty-three thousand, eight hundred sixty".