491849886 has 16 divisors (see below), whose sum is σ = 1073127168. Its totient is φ = 149045400.

The previous prime is 491849879. The next prime is 491849887. The reversal of 491849886 is 688948194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491849887) 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 7 ways as a sum of consecutive naturals, for example, 3726070 + ... + 3726201.

It is an arithmetic number, because the mean of its divisors is an integer number (67070448).

Almost surely, 2^491849886 is an apocalyptic number.

491849886 is an abundant number, since it is smaller than the sum of its proper divisors (581277282).

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

491849886 is a wasteful number, since it uses less digits than its factorization.

491849886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7452287.

The product of its digits is 3981312, while the sum is 57.

The square root of 491849886 is about 22177.6889237810. The cubic root of 491849886 is about 789.3643800388.

The spelling of 491849886 in words is "four hundred ninety-one million, eight hundred forty-nine thousand, eight hundred eighty-six".