628708 has 6 divisors (see below), whose sum is σ = 1100246. Its totient is φ = 314352.

The previous prime is 628699. The next prime is 628709. The reversal of 628708 is 807826.

It can be written as a sum of positive squares in only one way, i.e., 627264 + 1444 = 792^2 + 38^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 628708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78585 + ... + 78592.

2⁶²⁸⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

628708 is a deficient number, since it is larger than the sum of its proper divisors (471538).

628708 is a wasteful number, since it uses less digits than its factorization.

628708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157181 (or 157179 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 628708 is about 792.9110921156. The cubic root of 628708 is about 85.6675464758.

The spelling of 628708 in words is "six hundred twenty-eight thousand, seven hundred eight".