487991686 has 48 divisors (see below), whose sum is σ = 930844656. Its totient is φ = 190137024.

The previous prime is 487991663. The next prime is 487991711. The reversal of 487991686 is 686199784.

It is a self number, because there is not a number n which added to its sum of digits gives 487991686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82500 + ... + 88216.

It is an arithmetic number, because the mean of its divisors is an integer number (19392597).

Almost surely, 2^487991686 is an apocalyptic number.

487991686 is a deficient number, since it is larger than the sum of its proper divisors (442852970).

487991686 is a wasteful number, since it uses less digits than its factorization.

487991686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5813 (or 5806 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The square root of 487991686 is about 22090.5338550249. The cubic root of 487991686 is about 787.2949655517.

The spelling of 487991686 in words is "four hundred eighty-seven million, nine hundred ninety-one thousand, six hundred eighty-six".