550628 has 12 divisors (see below), whose sum is σ = 1037820. Its totient is φ = 254112.

The previous prime is 550621. The next prime is 550631. The reversal of 550628 is 826055.

It can be written as a sum of positive squares in 2 ways, for example, as 77284 + 473344 = 278^2 + 688^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 550597 and 550606.

It is not an unprimeable number, because it can be changed into a prime (550621) by changing a digit.

550628 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 3 ways as a sum of consecutive naturals, for example, 5243 + ... + 5346.

It is an arithmetic number, because the mean of its divisors is an integer number (86485).

2⁵⁵⁰⁶²⁸ is an apocalyptic number.

It is an amenable number.

550628 is a deficient number, since it is larger than the sum of its proper divisors (487192).

550628 is a wasteful number, since it uses less digits than its factorization.

550628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606 (or 10604 counting only the distinct ones).

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

The square root of 550628 is about 742.0431254314. The cubic root of 550628 is about 81.9632990629.

The spelling of 550628 in words is "five hundred fifty thousand, six hundred twenty-eight".