491233404 has 12 divisors (see below), whose sum is σ = 1146211304. Its totient is φ = 163744464.

The previous prime is 491233403. The next prime is 491233417. The reversal of 491233404 is 404332194.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491233403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20468047 + ... + 20468070.

Almost surely, 2^491233404 is an apocalyptic number.

It is an amenable number.

491233404 is an abundant number, since it is smaller than the sum of its proper divisors (654977900).

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

491233404 is a wasteful number, since it uses less digits than its factorization.

491233404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40936124 (or 40936122 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 491233404 is about 22163.7858679423. The cubic root of 491233404 is about 789.0344471331.

Adding to 491233404 its reverse (404332194), we get a palindrome (895565598).

The spelling of 491233404 in words is "four hundred ninety-one million, two hundred thirty-three thousand, four hundred four".