491630100 has 144 divisors (see below), whose sum is σ = 1573732608. Its totient is φ = 117711360.

The previous prime is 491630093. The next prime is 491630141. The reversal of 491630100 is 1036194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142597 + ... + 146003.

Almost surely, 2^491630100 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 491630100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786866304).

491630100 is an abundant number, since it is smaller than the sum of its proper divisors (1082102508).

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

491630100 is a wasteful number, since it uses less digits than its factorization.

491630100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474 (or 3467 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 491630100 is about 22172.7332550590. The cubic root of 491630100 is about 789.2467851568.

Adding to 491630100 its reverse (1036194), we get a palindrome (492666294).

The spelling of 491630100 in words is "four hundred ninety-one million, six hundred thirty thousand, one hundred".