491740 has 24 divisors (see below), whose sum is σ = 1078560. Its totient is φ = 187968.

The previous prime is 491737. The next prime is 491747. The reversal of 491740 is 47194.

It is a super-3 number, since 3×491740³ = 356720333520072000, which contains 333 as substring.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75 + ... + 994.

It is an arithmetic number, because the mean of its divisors is an integer number (44940).

2⁴⁹¹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

491740 is an abundant number, since it is smaller than the sum of its proper divisors (586820).

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

491740 is a wasteful number, since it uses less digits than its factorization.

491740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 491740 is about 701.2417557448. The cubic root of 491740 is about 78.9305590723.

The spelling of 491740 in words is "four hundred ninety-one thousand, seven hundred forty".