491905368 has 48 divisors (see below), whose sum is σ = 1338157080. Its totient is φ = 163240704.

The previous prime is 491905339. The next prime is 491905369. The reversal of 491905368 is 863509194.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491905369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1296 + ... + 31392.

Almost surely, 2^491905368 is an apocalyptic number.

It is an amenable number.

491905368 is an abundant number, since it is smaller than the sum of its proper divisors (846251712).

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

491905368 is a wasteful number, since it uses less digits than its factorization.

491905368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30336 (or 30329 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 491905368 is about 22178.9397402130. The cubic root of 491905368 is about 789.3940597365.

The spelling of 491905368 in words is "four hundred ninety-one million, nine hundred five thousand, three hundred sixty-eight".