686020080 has 320 divisors, whose sum is σ = 2422702080. Its totient is φ = 159667200.

The previous prime is 686020043. The next prime is 686020133. The reversal of 686020080 is 80020686.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3251175 + ... + 3251385.

It is an arithmetic number, because the mean of its divisors is an integer number (7570944).

Almost surely, 2^686020080 is an apocalyptic number.

686020080 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 686020080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1211351040).

686020080 is an abundant number, since it is smaller than the sum of its proper divisors (1736682000).

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

686020080 is a wasteful number, since it uses less digits than its factorization.

686020080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 686020080 is about 26191.9850335938. The cubic root of 686020080 is about 881.9533400175.

The spelling of 686020080 in words is "six hundred eighty-six million, twenty thousand, eighty".