686244860 has 24 divisors (see below), whose sum is σ = 1646988000. Its totient is φ = 235283904.

The previous prime is 686244847. The next prime is 686244877. The reversal of 686244860 is 68442686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450735 + ... + 2451014.

It is an arithmetic number, because the mean of its divisors is an integer number (68624500).

Almost surely, 2^686244860 is an apocalyptic number.

It is an amenable number.

686244860 is an abundant number, since it is smaller than the sum of its proper divisors (960743140).

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

686244860 is a wasteful number, since it uses less digits than its factorization.

686244860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901765 (or 4901763 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 686244860 is about 26196.2756894945. The cubic root of 686244860 is about 882.0496558685.

The spelling of 686244860 in words is "six hundred eighty-six million, two hundred forty-four thousand, eight hundred sixty".