686068812 has 192 divisors, whose sum is σ = 2158571520. Its totient is φ = 185587200.

The previous prime is 686068759. The next prime is 686068829. The reversal of 686068812 is 218860686.

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, 478048 + ... + 479480.

It is an arithmetic number, because the mean of its divisors is an integer number (11242560).

Almost surely, 2^686068812 is an apocalyptic number.

686068812 is a gapful number since it is divisible by the number (62) 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 686068812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079285760).

686068812 is an abundant number, since it is smaller than the sum of its proper divisors (1472502708).

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

686068812 is a wasteful number, since it uses less digits than its factorization.

686068812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 686068812 is about 26192.9153016612. The cubic root of 686068812 is about 881.9742229497.

The spelling of 686068812 in words is "six hundred eighty-six million, sixty-eight thousand, eight hundred twelve".