491899804 has 48 divisors (see below), whose sum is σ = 990210816. Its totient is φ = 211622400.

The previous prime is 491899789. The next prime is 491899813. The reversal of 491899804 is 408998194.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95659 + ... + 100669.

It is an arithmetic number, because the mean of its divisors is an integer number (20629392).

Almost surely, 2^491899804 is an apocalyptic number.

491899804 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

491899804 is an abundant number, since it is smaller than the sum of its proper divisors (498311012).

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

491899804 is a wasteful number, since it uses less digits than its factorization.

491899804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146 (or 5144 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 491899804 is about 22178.8143055484. The cubic root of 491899804 is about 789.3910834154.

The spelling of 491899804 in words is "four hundred ninety-one million, eight hundred ninety-nine thousand, eight hundred four".