491488704 has 168 divisors, whose sum is σ = 1631452160. Its totient is φ = 138557952.

The previous prime is 491488693. The next prime is 491488709. The reversal of 491488704 is 407884194.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×491488704² = 483122292319199232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491488704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491488709) 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 23 ways as a sum of consecutive naturals, for example, 317757 + ... + 319299.

Almost surely, 2^491488704 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 491488704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815726080).

491488704 is an abundant number, since it is smaller than the sum of its proper divisors (1139963456).

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

491488704 is a wasteful number, since it uses less digits than its factorization.

491488704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 491488704 is about 22169.5445149421. The cubic root of 491488704 is about 789.1711137399.

The spelling of 491488704 in words is "four hundred ninety-one million, four hundred eighty-eight thousand, seven hundred four".