628756 has 6 divisors (see below), whose sum is σ = 1100330. Its totient is φ = 314376.

The previous prime is 628753. The next prime is 628757. The reversal of 628756 is 657826.

It can be written as a sum of positive squares in only one way, i.e., 538756 + 90000 = 734^2 + 300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628753) by changing a digit.

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 as a sum of consecutive naturals, namely, 78591 + ... + 78598.

2⁶²⁸⁷⁵⁶ is an apocalyptic number.

628756 is the 502-nd centered pentagonal number.

It is an amenable number.

628756 is a deficient number, since it is larger than the sum of its proper divisors (471574).

628756 is a wasteful number, since it uses less digits than its factorization.

628756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157193 (or 157191 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 628756 is about 792.9413597486. The cubic root of 628756 is about 85.6697265751.

The spelling of 628756 in words is "six hundred twenty-eight thousand, seven hundred fifty-six".