491116836 has 48 divisors (see below), whose sum is σ = 1345049216. Its totient is φ = 136525824.

The previous prime is 491116823. The next prime is 491116837. The reversal of 491116836 is 638611194.

It is a junction number, because it is equal to n+sod(n) for n = 491116794 and 491116803.

It is not an unprimeable number, because it can be changed into a prime (491116837) 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, 75901 + ... + 82116.

Almost surely, 2^491116836 is an apocalyptic number.

It is an amenable number.

491116836 is an abundant number, since it is smaller than the sum of its proper divisors (853932380).

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

491116836 is a wasteful number, since it uses less digits than its factorization.

491116836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158068 (or 158066 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 491116836 is about 22161.1560167785. The cubic root of 491116836 is about 788.9720304741.

The spelling of 491116836 in words is "four hundred ninety-one million, one hundred sixteen thousand, eight hundred thirty-six".