27504 is a member of OEIS A109027: numbers with exactly 7 prime factors counted with multiplicity whose digit reversal is different & also has 7 prime factors (with multiplicity).

Its reversal is 40572 = 2^2 * 3^2 * 7^2 * 23

The sequence can be generated as follows (permalink):

INPUT

L=[]

for n in [1..40000]:

  F=factor(n)

  sum=0

  for f in F:

    sum+=f[1]

  if sum==7:

    number=int(str(n) [::-1])

    F1=factor(number)

    sum1=0

    for f in F1:

      sum1+=f[1]

    if sum1==7:

      L.append(n)

print(L)

OUTPUT

[8820, 21240, 21708, 21780, 21920, 23280, 23472, 23625, 23800, 25560, 25584, 25758, 26280, 27432, 27504, 27872, 27888, 27900, 27972, 28836, 29250, 29403, 29592, 29736, 29970, 30492, 34884, 36828]

27504 is a happy, Harshad, untouchabler, practical, abundant, pseudoperfect and Zumkeller number.

27504 can be rendered as a digit equation as follows:

-2 + 7 + 5 = 0 * 4