491584 has 14 divisors (see below), whose sum is σ = 975614. Its totient is φ = 245760.

The previous prime is 491581. The next prime is 491591. The reversal of 491584 is 485194.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 451584 + 40000 = 672^2 + 200^2 .

It is not an unprimeable number, because it can be changed into a prime (491581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3777 + ... + 3904.

2⁴⁹¹⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

491584 is a deficient number, since it is larger than the sum of its proper divisors (484030).

491584 is an equidigital number, since it uses as much as digits as its factorization.

491584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693 (or 7683 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 491584 is about 701.1305156674. The cubic root of 491584 is about 78.9222115245.

The spelling of 491584 in words is "four hundred ninety-one thousand, five hundred eighty-four".