491736 has 32 divisors (see below), whose sum is σ = 1405440. Its totient is φ = 140448.

The previous prime is 491731. The next prime is 491737. The reversal of 491736 is 637194.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491731) 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, 1296 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (43920).

2⁴⁹¹⁷³⁶ is an apocalyptic number.

It is an amenable number.

491736 is an abundant number, since it is smaller than the sum of its proper divisors (913704).

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

491736 is a wasteful number, since it uses less digits than its factorization.

491736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943 (or 2939 counting only the distinct ones).

The product of its digits is 4536, while the sum is 30.

The square root of 491736 is about 701.2389036555. The cubic root of 491736 is about 78.9303450547.

The spelling of 491736 in words is "four hundred ninety-one thousand, seven hundred thirty-six".