27556 has 9 divisors (see below), whose sum is σ = 48811.
Its totient is φ = 13612.
The previous prime is 27551. The next prime is 27581. The reversal of 27556 is 65572.
Multipling 27556 by its sum of digits (25), we get a square (688900 = 8302).
It can be divided in two parts, 275 and 56, that multiplied together give a triangular number (15400 = T175).
27556 = T165 + T166.
It is a happy number.
The square root of 27556 is 166.
It is a perfect power (a square), and thus also a powerful number.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 27556.
It is not an unprimeable number, because it can be changed into a prime (27551) by changing a digit.
27556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 291 + ... + 373.
227556 is an apocalyptic number.
27556 is the 166-th square number.
It is an amenable number.
27556 is a deficient number, since it is larger than the sum of its proper divisors (21255).
27556 is an equidigital number, since it uses as much as digits as its factorization.
27556 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 170 (or 85 counting only the distinct ones).
The product of its digits is 2100, while the sum is 25.
The cubic root of 27556 is about 30.2045283621.
The spelling of 27556 in words is "twenty-seven thousand, five hundred fifty-six".