491266684 has 12 divisors (see below), whose sum is σ = 859875408. Its totient is φ = 245588000.

The previous prime is 491266681. The next prime is 491266687. The reversal of 491266684 is 486662194.

It is an interprime number because it is at equal distance from previous prime (491266681) and next prime (491266687).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491266681) 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, 28944 + ... + 42664.

It is an arithmetic number, because the mean of its divisors is an integer number (71656284).

Almost surely, 2^491266684 is an apocalyptic number.

It is an amenable number.

491266684 is a deficient number, since it is larger than the sum of its proper divisors (368608724).

491266684 is a wasteful number, since it uses less digits than its factorization.

491266684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22676 (or 22674 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 491266684 is about 22164.5366294899. The cubic root of 491266684 is about 789.0522651895.

The spelling of 491266684 in words is "four hundred ninety-one million, two hundred sixty-six thousand, six hundred eighty-four".