686802020 has 48 divisors (see below), whose sum is σ = 1490626368. Its totient is φ = 265641600.

The previous prime is 686801959. The next prime is 686802049. The reversal of 686802020 is 20208686.

It is a happy number.

686802020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82907 + ... + 90813.

It is an arithmetic number, because the mean of its divisors is an integer number (31054716).

Almost surely, 2^686802020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686802020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745313184).

686802020 is an abundant number, since it is smaller than the sum of its proper divisors (803824348).

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

686802020 is a wasteful number, since it uses less digits than its factorization.

686802020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060 (or 8058 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 686802020 is about 26206.9078679649. The cubic root of 686802020 is about 882.2883023899.

The spelling of 686802020 in words is "six hundred eighty-six million, eight hundred two thousand, twenty".