491687532 has 72 divisors (see below), whose sum is σ = 1503998496. Its totient is φ = 132217344.

The previous prime is 491687527. The next prime is 491687543. The reversal of 491687532 is 235786194.

491687532 is a `hidden beast` number, since 491 + 68 + 75 + 32 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53103 + ... + 61670.

It is an arithmetic number, because the mean of its divisors is an integer number (20888868).

Almost surely, 2^491687532 is an apocalyptic number.

491687532 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

491687532 is an abundant number, since it is smaller than the sum of its proper divisors (1012310964).

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

491687532 is a wasteful number, since it uses less digits than its factorization.

491687532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114807 (or 114802 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 491687532 is about 22174.0283214395. The cubic root of 491687532 is about 789.2775171078.

The spelling of 491687532 in words is "four hundred ninety-one million, six hundred eighty-seven thousand, five hundred thirty-two".