491968146 has 8 divisors (see below), whose sum is σ = 983936304. Its totient is φ = 163989380.

The previous prime is 491968133. The next prime is 491968153. The reversal of 491968146 is 641869194.

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

491968146 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 491968095 and 491968104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40997340 + ... + 40997351.

It is an arithmetic number, because the mean of its divisors is an integer number (122992038).

Almost surely, 2^491968146 is an apocalyptic number.

491968146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

491968146 is a wasteful number, since it uses less digits than its factorization.

491968146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81994696.

The product of its digits is 373248, while the sum is 48.

The square root of 491968146 is about 22180.3549565826. The cubic root of 491968146 is about 789.4276396861.

The spelling of 491968146 in words is "four hundred ninety-one million, nine hundred sixty-eight thousand, one hundred forty-six".