628903 has 4 divisors (see below), whose sum is σ = 686088. Its totient is φ = 571720.

The previous prime is 628877. The next prime is 628909. The reversal of 628903 is 309826.

628903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 628903 - 2⁹ = 628391 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 (628909) 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, 28576 + ... + 28597.

It is an arithmetic number, because the mean of its divisors is an integer number (171522).

2⁶²⁸⁹⁰³ is an apocalyptic number.

628903 is a deficient number, since it is larger than the sum of its proper divisors (57185).

628903 is a wasteful number, since it uses less digits than its factorization.

628903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57184.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 628903 is about 793.0340471884. The cubic root of 628903 is about 85.6764024390.

The spelling of 628903 in words is "six hundred twenty-eight thousand, nine hundred three".