686148 has 12 divisors (see below), whose sum is σ = 1601040. Its totient is φ = 228712.

The previous prime is 686143. The next prime is 686149. The reversal of 686148 is 841686.

It is a tau number, because it is divible by the number of its divisors (12).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686148.

It is not an unprimeable number, because it can be changed into a prime (686141) by changing a digit.

686148 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28578 + ... + 28601.

It is an arithmetic number, because the mean of its divisors is an integer number (133420).

2⁶⁸⁶¹⁴⁸ is an apocalyptic number.

It is an amenable number.

686148 is an abundant number, since it is smaller than the sum of its proper divisors (914892).

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

686148 is a wasteful number, since it uses less digits than its factorization.

686148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57186 (or 57184 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 686148 is about 828.3405096939. The cubic root of 686148 is about 88.2008154963.

It can be divided in two parts, 68 and 6148, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 686148 in words is "six hundred eighty-six thousand, one hundred forty-eight".