491622068 has 48 divisors (see below), whose sum is σ = 1010257920. Its totient is φ = 204962016.

The previous prime is 491622067. The next prime is 491622091. The reversal of 491622068 is 860226194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491622067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234521 + ... + 236607.

It is an arithmetic number, because the mean of its divisors is an integer number (21047040).

Almost surely, 2^491622068 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 491622068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505128960).

491622068 is an abundant number, since it is smaller than the sum of its proper divisors (518635852).

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

491622068 is a wasteful number, since it uses less digits than its factorization.

491622068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324 (or 2322 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 491622068 is about 22172.5521309569. The cubic root of 491622068 is about 789.2424870306.

The spelling of 491622068 in words is "four hundred ninety-one million, six hundred twenty-two thousand, sixty-eight".