628255 has 4 divisors (see below), whose sum is σ = 753912. Its totient is φ = 502600.

The previous prime is 628231. The next prime is 628261. The reversal of 628255 is 552826.

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

It is not a de Polignac number, because 628255 - 2⁷ = 628127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 62821 + ... + 62830.

It is an arithmetic number, because the mean of its divisors is an integer number (188478).

2⁶²⁸²⁵⁵ is an apocalyptic number.

628255 is a deficient number, since it is larger than the sum of its proper divisors (125657).

628255 is a wasteful number, since it uses less digits than its factorization.

628255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125656.

The product of its digits is 4800, while the sum is 28.

The square root of 628255 is about 792.6253844030. The cubic root of 628255 is about 85.6469663216.

The spelling of 628255 in words is "six hundred twenty-eight thousand, two hundred fifty-five".