491431924 has 12 divisors (see below), whose sum is σ = 860188000. Its totient is φ = 245663928.

The previous prime is 491431909. The next prime is 491431943. The reversal of 491431924 is 429134194.

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, 14887 + ... + 34705.

Almost surely, 2^491431924 is an apocalyptic number.

It is an amenable number.

491431924 is a deficient number, since it is larger than the sum of its proper divisors (368756076).

491431924 is a wasteful number, since it uses less digits than its factorization.

491431924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26022 (or 26020 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 491431924 is about 22168.2638923304. The cubic root of 491431924 is about 789.1407224945.

The spelling of 491431924 in words is "four hundred ninety-one million, four hundred thirty-one thousand, nine hundred twenty-four".