128386 has 8 divisors (see below), whose sum is σ = 201024. Its totient is φ = 61380.

The previous prime is 128377. The next prime is 128389. The reversal of 128386 is 683821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (128389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350 + ... + 1441.

It is an arithmetic number, because the mean of its divisors is an integer number (25128).

2¹²⁸³⁸⁶ is an apocalyptic number.

128386 is a deficient number, since it is larger than the sum of its proper divisors (72638).

128386 is a wasteful number, since it uses less digits than its factorization.

128386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its digits is 2304, while the sum is 28.

The square root of 128386 is about 358.3099217158. The cubic root of 128386 is about 50.4474504833.

It can be divided in two parts, 12838 and 6, that multiplied together give a triangular number (77028 = T₃₉₂).

The spelling of 128386 in words is "one hundred twenty-eight thousand, three hundred eighty-six".