491381744 has 80 divisors (see below), whose sum is σ = 1129261056. Its totient is φ = 202694400.

The previous prime is 491381717. The next prime is 491381773. The reversal of 491381744 is 447183194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1065674 + ... + 1066134.

Almost surely, 2^491381744 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 491381744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564630528).

491381744 is an abundant number, since it is smaller than the sum of its proper divisors (637879312).

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

491381744 is a wasteful number, since it uses less digits than its factorization.

491381744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 808 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 491381744 is about 22167.1320652898. The cubic root of 491381744 is about 789.1138619214.

The spelling of 491381744 in words is "four hundred ninety-one million, three hundred eighty-one thousand, seven hundred forty-four".