491397368 has 64 divisors (see below), whose sum is σ = 1185822720. Its totient is φ = 185270400.

The previous prime is 491397367. The next prime is 491397409. The reversal of 491397368 is 863793194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491397367) 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 15 ways as a sum of consecutive naturals, for example, 6230 + ... + 31962.

It is an arithmetic number, because the mean of its divisors is an integer number (18528480).

Almost surely, 2^491397368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491397368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592911360).

491397368 is an abundant number, since it is smaller than the sum of its proper divisors (694425352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491397368 is a wasteful number, since it uses less digits than its factorization.

491397368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25788 (or 25784 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 491397368 is about 22167.4844761421. The cubic root of 491397368 is about 789.1222254015.

The spelling of 491397368 in words is "four hundred ninety-one million, three hundred ninety-seven thousand, three hundred sixty-eight".