30556 has 6 divisors (see below), whose sum is σ = 53480. Its totient is φ = 15276.

The previous prime is 30553. The next prime is 30557. The reversal of 30556 is 65503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3816 + ... + 3823.

2³⁰⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

30556 is a deficient number, since it is larger than the sum of its proper divisors (22924).

30556 is a wasteful number, since it uses less digits than its factorization.

30556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7643 (or 7641 counting only the distinct ones).

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

The square root of 30556 is about 174.8027459739. The cubic root of 30556 is about 31.2631091667.

It can be divided in two parts, 305 and 56, that added together give a square (361 = 19²).

The spelling of 30556 in words is "thirty thousand, five hundred fifty-six".