491976148 has 12 divisors (see below), whose sum is σ = 861114240. Its totient is φ = 245943512.

The previous prime is 491976131. The next prime is 491976181. The reversal of 491976148 is 841679194.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34215 + ... + 46417.

It is an arithmetic number, because the mean of its divisors is an integer number (71759520).

Almost surely, 2^491976148 is an apocalyptic number.

It is an amenable number.

491976148 is a deficient number, since it is larger than the sum of its proper divisors (369138092).

491976148 is a wasteful number, since it uses less digits than its factorization.

491976148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22286 (or 22284 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 491976148 is about 22180.5353406991. The cubic root of 491976148 is about 789.4319197502.

The spelling of 491976148 in words is "four hundred ninety-one million, nine hundred seventy-six thousand, one hundred forty-eight".