491108136 has 32 divisors (see below), whose sum is σ = 1245067200. Its totient is φ = 161396480.

The previous prime is 491108119. The next prime is 491108171. The reversal of 491108136 is 631801194.

It is a junction number, because it is equal to n+sod(n) for n = 491108097 and 491108106.

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, 142401 + ... + 145808.

It is an arithmetic number, because the mean of its divisors is an integer number (38908350).

Almost surely, 2^491108136 is an apocalyptic number.

It is an amenable number.

491108136 is an abundant number, since it is smaller than the sum of its proper divisors (753959064).

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

491108136 is a wasteful number, since it uses less digits than its factorization.

491108136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288289 (or 288285 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 491108136 is about 22160.9597265100. The cubic root of 491108136 is about 788.9673716389.

The spelling of 491108136 in words is "four hundred ninety-one million, one hundred eight thousand, one hundred thirty-six".