128682 has 16 divisors (see below), whose sum is σ = 286080. Its totient is φ = 42876.

The previous prime is 128677. The next prime is 128683. The reversal of 128682 is 286821.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (128683) by changing a digit.

128682 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 1138 + ... + 1245.

It is an arithmetic number, because the mean of its divisors is an integer number (17880).

2¹²⁸⁶⁸² is an apocalyptic number.

128682 is an abundant number, since it is smaller than the sum of its proper divisors (157398).

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

128682 is a wasteful number, since it uses less digits than its factorization.

128682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394 (or 2388 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 128682 is about 358.7227341555. The cubic root of 128682 is about 50.4861903880.

The spelling of 128682 in words is "one hundred twenty-eight thousand, six hundred eighty-two".