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3556 = 227127

3556 has 12 divisors (see below), whose sum is σ = 7168. Its totient is φ = 1512.

The previous prime is 3547. The next prime is 3557. The reversal of 3556 is 6553.

3556 is an admirable number.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3557) by changing a digit.

3556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36 + ... + 91.

It is an amenable number.

3556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3584).

3556 is a wasteful number, since it uses less digits than its factorization.

3556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its digits is 450, while the sum is 19.

The square root of 3556 is about 59.6322060635. The cubic root of 3556 is about 15.2634924932.

It can be divided in two parts, 355 and 6, that added together give a square (361 = 192).

The spelling of 3556 in words is "three thousand, five hundred fifty-six".

Divisors: 1 2 4 7 14 28 127 254 508 889 1778 3556