628229 has 6 divisors (see below), whose sum is σ = 730854. Its totient is φ = 538440.

The previous prime is 628219. The next prime is 628231. The reversal of 628229 is 922826.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 240100 = 623^2 + 490^2 .

It is not a de Polignac number, because 628229 - 2⁴ = 628213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6362 + ... + 6459.

It is an arithmetic number, because the mean of its divisors is an integer number (121809).

2⁶²⁸²²⁹ is an apocalyptic number.

It is an amenable number.

628229 is a deficient number, since it is larger than the sum of its proper divisors (102625).

628229 is a wasteful number, since it uses less digits than its factorization.

628229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12835 (or 12828 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 628229 is about 792.6089830427. The cubic root of 628229 is about 85.6457848205.

The spelling of 628229 in words is "six hundred twenty-eight thousand, two hundred twenty-nine".