628028 has 6 divisors (see below), whose sum is σ = 1099056. Its totient is φ = 314012.

The previous prime is 628021. The next prime is 628037. The reversal of 628028 is 820826.

628028 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 = 627988 and 628006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628021) by changing a digit.

628028 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, 78500 + ... + 78507.

It is an arithmetic number, because the mean of its divisors is an integer number (183176).

2⁶²⁸⁰²⁸ is an apocalyptic number.

It is an amenable number.

628028 is a deficient number, since it is larger than the sum of its proper divisors (471028).

628028 is a wasteful number, since it uses less digits than its factorization.

628028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157011 (or 157009 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 628028 is about 792.4821764557. The cubic root of 628028 is about 85.6366498082.

The spelling of 628028 in words is "six hundred twenty-eight thousand, twenty-eight".