27687 is a member of OEIS A351866: numbers n such that sigma(n) = tau(n)! where sigma(n) is the sum of divisors and tau(n) is the number of divisors.

The sequence can be generated as follows:

INPUT

L=[]

for n in [1..40000]:

  if sigma(n)==factorial(sigma(n,0)):

    L.append(n)

print(L)

OUTPUT

[1, 14, 15, 20154, 21496, 22390, 25978, 26314, 26386, 26439, 27687, 28041, 28671, 28911, 29365, 29397, 29559, 29607, 31135, 32263, 32335, 32665, 32669, 32785, 33383, 33901, 34177, 34279, 34903, 35167, 35629, 35867, 36049, 36271, 36613, 36859]

27687 is a cyclic and sphenic number.

27687 can be rendered as a digit equation as follows:

-2 + 7 = 6 -8 + 7