491918804 has 24 divisors (see below), whose sum is σ = 935752608. Its totient is φ = 224915040.

The previous prime is 491918789. The next prime is 491918827. The reversal of 491918804 is 408819194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38642 + ... + 49769.

It is an arithmetic number, because the mean of its divisors is an integer number (38989692).

Almost surely, 2^491918804 is an apocalyptic number.

It is an amenable number.

491918804 is a deficient number, since it is larger than the sum of its proper divisors (443833804).

491918804 is a wasteful number, since it uses less digits than its factorization.

491918804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88535 (or 88533 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 491918804 is about 22179.2426381065. The cubic root of 491918804 is about 789.4012468927.

The spelling of 491918804 in words is "four hundred ninety-one million, nine hundred eighteen thousand, eight hundred four".