628933 has 4 divisors (see below), whose sum is σ = 630540. Its totient is φ = 627328.

The previous prime is 628921. The next prime is 628937. The reversal of 628933 is 339826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 339826 = 2 ⋅169913.

It can be written as a sum of positive squares in 2 ways, for example, as 334084 + 294849 = 578^2 + 543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628895 and 628904.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 213 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (157635).

2⁶²⁸⁹³³ is an apocalyptic number.

It is an amenable number.

628933 is a deficient number, since it is larger than the sum of its proper divisors (1607).

628933 is an equidigital number, since it uses as much as digits as its factorization.

628933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its digits is 7776, while the sum is 31.

The square root of 628933 is about 793.0529616615. The cubic root of 628933 is about 85.6777647324.

The spelling of 628933 in words is "six hundred twenty-eight thousand, nine hundred thirty-three".