491710872 has 32 divisors (see below), whose sum is σ = 1229820480. Its totient is φ = 163831200.

The previous prime is 491710837. The next prime is 491710883. The reversal of 491710872 is 278017194.

It is a self number, because there is not a number n which added to its sum of digits gives 491710872.

It is a congruent number.

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, 104523 + ... + 109125.

It is an arithmetic number, because the mean of its divisors is an integer number (38431890).

Almost surely, 2^491710872 is an apocalyptic number.

It is an amenable number.

491710872 is an abundant number, since it is smaller than the sum of its proper divisors (738109608).

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

491710872 is a wasteful number, since it uses less digits than its factorization.

491710872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9063 (or 9059 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 491710872 is about 22174.5546065755. The cubic root of 491710872 is about 789.2900056936.

The spelling of 491710872 in words is "four hundred ninety-one million, seven hundred ten thousand, eight hundred seventy-two".