491267968 has 32 divisors (see below), whose sum is σ = 979707960. Its totient is φ = 245380608.

The previous prime is 491267963. The next prime is 491267969. The reversal of 491267968 is 869762194.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491267963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215571 + ... + 217837.

Almost surely, 2^491267968 is an apocalyptic number.

It is an amenable number.

491267968 is a deficient number, since it is larger than the sum of its proper divisors (488439992).

491267968 is a wasteful number, since it uses less digits than its factorization.

491267968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974 (or 3962 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 491267968 is about 22164.5655946603. The cubic root of 491267968 is about 789.0529526248.

The spelling of 491267968 in words is "four hundred ninety-one million, two hundred sixty-seven thousand, nine hundred sixty-eight".