686796180 has 48 divisors (see below), whose sum is σ = 2197749120. Its totient is φ = 156981888.

The previous prime is 686796139. The next prime is 686796193. The reversal of 686796180 is 81697686.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 817195 + ... + 818034.

It is an arithmetic number, because the mean of its divisors is an integer number (45786440).

Almost surely, 2^686796180 is an apocalyptic number.

686796180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686796180 is an abundant number, since it is smaller than the sum of its proper divisors (1510952940).

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

686796180 is a wasteful number, since it uses less digits than its factorization.

686796180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635248 (or 1635246 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 686796180 is about 26206.7964467235. The cubic root of 686796180 is about 882.2858016313.

The spelling of 686796180 in words is "six hundred eighty-six million, seven hundred ninety-six thousand, one hundred eighty".