628873 has 4 divisors (see below), whose sum is σ = 718720. Its totient is φ = 539028.

The previous prime is 628861. The next prime is 628877. The reversal of 628873 is 378826.

It is a happy number.

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 not a de Polignac number, because 628873 - 2⁵ = 628841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628877) 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, 44913 + ... + 44926.

It is an arithmetic number, because the mean of its divisors is an integer number (179680).

628873 is a Friedman number, since it can be written as (68^3+8)*2-7, using all its digits and the basic arithmetic operations.

2⁶²⁸⁸⁷³ is an apocalyptic number.

It is an amenable number.

628873 is a deficient number, since it is larger than the sum of its proper divisors (89847).

628873 is an equidigital number, since it uses as much as digits as its factorization.

628873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89846.

The product of its digits is 16128, while the sum is 34.

The square root of 628873 is about 793.0151322642. The cubic root of 628873 is about 85.6750401023.

Subtracting from 628873 its reverse (378826), we obtain a cube (250047 = 63³).

The spelling of 628873 in words is "six hundred twenty-eight thousand, eight hundred seventy-three".