628205 has 4 divisors (see below), whose sum is σ = 753852. Its totient is φ = 502560.

The previous prime is 628193. The next prime is 628207. The reversal of 628205 is 502826.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157609 + 470596 = 397^2 + 686^2 .

It is not a de Polignac number, because 628205 - 2⁴ = 628189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628205.

It is not an unprimeable number, because it can be changed into a prime (628207) 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, 62816 + ... + 62825.

It is an arithmetic number, because the mean of its divisors is an integer number (188463).

2⁶²⁸²⁰⁵ is an apocalyptic number.

It is an amenable number.

628205 is a deficient number, since it is larger than the sum of its proper divisors (125647).

628205 is a wasteful number, since it uses less digits than its factorization.

628205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125646.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 628205 is about 792.5938430243. The cubic root of 628205 is about 85.6446941752.

The spelling of 628205 in words is "six hundred twenty-eight thousand, two hundred five".