55628 has 6 divisors (see below), whose sum is σ = 97356. Its totient is φ = 27812.

The previous prime is 55621. The next prime is 55631. The reversal of 55628 is 82655.

55628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55597 and 55606.

It is not an unprimeable number, because it can be changed into a prime (55621) by changing a digit.

55628 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 as a sum of consecutive naturals, namely, 6950 + ... + 6957.

It is an arithmetic number, because the mean of its divisors is an integer number (16226).

2⁵⁵⁶²⁸ is an apocalyptic number.

It is an amenable number.

55628 is a deficient number, since it is larger than the sum of its proper divisors (41728).

55628 is a wasteful number, since it uses less digits than its factorization.

55628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13911 (or 13909 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 55628 is about 235.8558882029. The cubic root of 55628 is about 38.1737198519.

The spelling of 55628 in words is "fifty-five thousand, six hundred twenty-eight".