491856442 has 16 divisors (see below), whose sum is σ = 919835712. Its totient is φ = 191632320.

The previous prime is 491856437. The next prime is 491856451. The reversal of 491856442 is 244658194.

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 7 ways as a sum of consecutive naturals, for example, 1596783 + ... + 1597090.

It is an arithmetic number, because the mean of its divisors is an integer number (57489732).

Almost surely, 2^491856442 is an apocalyptic number.

491856442 is a deficient number, since it is larger than the sum of its proper divisors (427979270).

491856442 is a wasteful number, since it uses less digits than its factorization.

491856442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193893.

The product of its digits is 276480, while the sum is 43.

The square root of 491856442 is about 22177.8367294919. The cubic root of 491856442 is about 789.3678872402.

The spelling of 491856442 in words is "four hundred ninety-one million, eight hundred fifty-six thousand, four hundred forty-two".