686000220 has 96 divisors (see below), whose sum is σ = 2005819200. Its totient is φ = 174956544.

The previous prime is 686000197. The next prime is 686000221. The reversal of 686000220 is 22000686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686000221) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 187852 + ... + 191468.

It is an arithmetic number, because the mean of its divisors is an integer number (20893950).

Almost surely, 2^686000220 is an apocalyptic number.

686000220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002909600).

686000220 is an abundant number, since it is smaller than the sum of its proper divisors (1319818980).

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

686000220 is a wasteful number, since it uses less digits than its factorization.

686000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767 (or 3765 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 686000220 is about 26191.6059072368. The cubic root of 686000220 is about 881.9448292062.

The spelling of 686000220 in words is "six hundred eighty-six million, two hundred twenty", and thus it is an aban number.