628930 has 16 divisors (see below), whose sum is σ = 1144440. Its totient is φ = 248832.

The previous prime is 628921. The next prime is 628937. The reversal of 628930 is 39826.

It can be written as a sum of positive squares in 4 ways, for example, as 628849 + 81 = 793^2 + 9^2 .

It is not an unprimeable number, because it can be changed into a prime (628937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802 + ... + 1378.

2⁶²⁸⁹³⁰ is an apocalyptic number.

628930 is a deficient number, since it is larger than the sum of its proper divisors (515510).

628930 is a wasteful number, since it uses less digits than its factorization.

628930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 628930 is about 793.0510702344. The cubic root of 628930 is about 85.6776285050.

The spelling of 628930 in words is "six hundred twenty-eight thousand, nine hundred thirty".