491808194 has 8 divisors (see below), whose sum is σ = 738781968. Its totient is φ = 245547540.

The previous prime is 491808173. The next prime is 491808199.

491808194 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (491808199) 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 3 ways as a sum of consecutive naturals, for example, 176552 + ... + 179315.

It is an arithmetic number, because the mean of its divisors is an integer number (92347746).

Almost surely, 2^491808194 is an apocalyptic number.

491808194 is a deficient number, since it is larger than the sum of its proper divisors (246973774).

491808194 is a wasteful number, since it uses less digits than its factorization.

491808194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356560.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 491808194 is about 22176.7489501956. The cubic root of 491808194 is about 789.3420757338.

The spelling of 491808194 in words is "four hundred ninety-one million, eight hundred eight thousand, one hundred ninety-four".