686133180 has 120 divisors (see below), whose sum is σ = 2210791968. Its totient is φ = 178008192.

The previous prime is 686133169. The next prime is 686133181. The reversal of 686133180 is 81331686.

686133180 is a `hidden beast` number, since 6 + 8 + 613 + 31 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686133181) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 54217 + ... + 65663.

Almost surely, 2^686133180 is an apocalyptic number.

686133180 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 686133180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1105395984).

686133180 is an abundant number, since it is smaller than the sum of its proper divisors (1524658788).

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

686133180 is a wasteful number, since it uses less digits than its factorization.

686133180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11505 (or 11494 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 686133180 is about 26194.1440020475. The cubic root of 686133180 is about 882.0018047999.

The spelling of 686133180 in words is "six hundred eighty-six million, one hundred thirty-three thousand, one hundred eighty".