491744 has 36 divisors (see below), whose sum is σ = 1072512. Its totient is φ = 221760.

The previous prime is 491737. The next prime is 491747. The reversal of 491744 is 447194.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491747) by changing a digit.

491744 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3809 + ... + 3935.

It is an arithmetic number, because the mean of its divisors is an integer number (29792).

2⁴⁹¹⁷⁴⁴ is an apocalyptic number.

491744 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536256).

491744 is an abundant number, since it is smaller than the sum of its proper divisors (580768).

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

491744 is a wasteful number, since it uses less digits than its factorization.

491744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 140 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 491744 is about 701.2446078224. The cubic root of 491744 is about 78.9307730888.

The spelling of 491744 in words is "four hundred ninety-one thousand, seven hundred forty-four".