491636068 has 108 divisors (see below), whose sum is σ = 1124171328. Its totient is φ = 184140000.

The previous prime is 491636053. The next prime is 491636069. The reversal of 491636068 is 860636194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491636069) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3255793 + ... + 3255943.

Almost surely, 2^491636068 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491636068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (562085664).

491636068 is an abundant number, since it is smaller than the sum of its proper divisors (632535260).

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

491636068 is a wasteful number, since it uses less digits than its factorization.

491636068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 491636068 is about 22172.8678343601. The cubic root of 491636068 is about 789.2499787541.

The spelling of 491636068 in words is "four hundred ninety-one million, six hundred thirty-six thousand, sixty-eight".