491358938 has 16 divisors (see below), whose sum is σ = 847039680. Its totient is φ = 209404896.

The previous prime is 491358937. The next prime is 491358941. The reversal of 491358938 is 839853194.

It is not an unprimeable number, because it can be changed into a prime (491358937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95531 + ... + 100542.

It is an arithmetic number, because the mean of its divisors is an integer number (52939980).

Almost surely, 2^491358938 is an apocalyptic number.

491358938 is a deficient number, since it is larger than the sum of its proper divisors (355680742).

491358938 is a wasteful number, since it uses less digits than its factorization.

491358938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196261.

The product of its digits is 933120, while the sum is 50.

The square root of 491358938 is about 22166.6176490686. The cubic root of 491358938 is about 789.1016536201.

The spelling of 491358938 in words is "four hundred ninety-one million, three hundred fifty-eight thousand, nine hundred thirty-eight".