686328 has 16 divisors (see below), whose sum is σ = 1715880. Its totient is φ = 228768.

The previous prime is 686321. The next prime is 686333. The reversal of 686328 is 823686.

It is a super-2 number, since 2×686328² = 942092247168, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14275 + ... + 14322.

2⁶⁸⁶³²⁸ is an apocalyptic number.

It is an amenable number.

686328 is an abundant number, since it is smaller than the sum of its proper divisors (1029552).

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

686328 is a wasteful number, since it uses less digits than its factorization.

686328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28606 (or 28602 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 686328 is about 828.4491535393. The cubic root of 686328 is about 88.2085275150.

The spelling of 686328 in words is "six hundred eighty-six thousand, three hundred twenty-eight".