628828 has 6 divisors (see below), whose sum is σ = 1100456. Its totient is φ = 314412.

The previous prime is 628819. The next prime is 628841. The reversal of 628828 is 828826.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 628793 and 628802.

It is a congruent number.

It is an unprimeable number.

628828 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, 78600 + ... + 78607.

2⁶²⁸⁸²⁸ is an apocalyptic number.

It is an amenable number.

628828 is a deficient number, since it is larger than the sum of its proper divisors (471628).

628828 is a wasteful number, since it uses less digits than its factorization.

628828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157211 (or 157209 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 628828 is about 792.9867590320. The cubic root of 628828 is about 85.6729965160.

The spelling of 628828 in words is "six hundred twenty-eight thousand, eight hundred twenty-eight".