628629 has 4 divisors (see below), whose sum is σ = 838176. Its totient is φ = 419084.

The previous prime is 628591. The next prime is 628651. The reversal of 628629 is 926826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628629 - 2⁸ = 628373 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 628629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628679) 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 in 3 ways as a sum of consecutive naturals, for example, 104769 + ... + 104774.

It is an arithmetic number, because the mean of its divisors is an integer number (209544).

2⁶²⁸⁶²⁹ is an apocalyptic number.

It is an amenable number.

628629 is a deficient number, since it is larger than the sum of its proper divisors (209547).

628629 is a wasteful number, since it uses less digits than its factorization.

628629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209546.

The product of its digits is 10368, while the sum is 33.

The square root of 628629 is about 792.8612741205. The cubic root of 628629 is about 85.6639581541.

The spelling of 628629 in words is "six hundred twenty-eight thousand, six hundred twenty-nine".