491404 has 12 divisors (see below), whose sum is σ = 880264. Its totient is φ = 239904.

The previous prime is 491377. The next prime is 491417. The reversal of 491404 is 404194.

It is a happy number.

It is an unprimeable number.

491404 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257 + ... + 1600.

2⁴⁹¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

491404 is a deficient number, since it is larger than the sum of its proper divisors (388860).

491404 is a wasteful number, since it uses less digits than its factorization.

491404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904 (or 2902 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 491404 is about 701.0021397970. The cubic root of 491404 is about 78.9125775437.

Adding to 491404 its reverse (404194), we get a palindrome (895598).

The spelling of 491404 in words is "four hundred ninety-one thousand, four hundred four".