686482188 has 96 divisors (see below), whose sum is σ = 1915619328. Its totient is φ = 187238400.

The previous prime is 686482177. The next prime is 686482193. The reversal of 686482188 is 881284686.

It is a self number, because there is not a number n which added to its sum of digits gives 686482188.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159748 + ... + 163988.

It is an arithmetic number, because the mean of its divisors is an integer number (19954368).

Almost surely, 2^686482188 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 686482188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957809664).

686482188 is an abundant number, since it is smaller than the sum of its proper divisors (1229137140).

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

686482188 is a wasteful number, since it uses less digits than its factorization.

686482188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343 (or 4341 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 51.

The square root of 686482188 is about 26200.8051021338. The cubic root of 686482188 is about 882.1513255814.

The spelling of 686482188 in words is "six hundred eighty-six million, four hundred eighty-two thousand, one hundred eighty-eight".