27520 is a member of OEIS A107085: numbers n such that in decimal representation the largest digit is equal to the digital root, here 7.

27520 is a happy number.

27520 is a tau number because it is divisible by the number of its divisors (32).

27520 is a Harshad number ince it is a multiple of its sum of digits (16).

27520 is a junction number because it is equal to n+sod(n) for n = 27494 and 27503.

27520 is a practical number because each smaller number is the sum of distinct divisors of 27520.

27520 is an abundant, Zumkeller & pseudoperfect number.

27520 can be rendered as a digit equation as follows:

-2 + 7 -5 = 2 * 0