491091708 has 48 divisors (see below), whose sum is σ = 1245117440. Its totient is φ = 150076800.

The previous prime is 491091701. The next prime is 491091721. The reversal of 491091708 is 807190194.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491091701) 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, 27673 + ... + 41808.

Almost surely, 2^491091708 is an apocalyptic number.

It is an amenable number.

491091708 is an abundant number, since it is smaller than the sum of its proper divisors (754025732).

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

491091708 is a wasteful number, since it uses less digits than its factorization.

491091708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69538 (or 69536 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 491091708 is about 22160.5890715928. The cubic root of 491091708 is about 788.9585743228.

The spelling of 491091708 in words is "four hundred ninety-one million, ninety-one thousand, seven hundred eight".