628867 has 4 divisors (see below), whose sum is σ = 631800. Its totient is φ = 625936.

The previous prime is 628861. The next prime is 628877. The reversal of 628867 is 768826.

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 628867 - 2¹⁹ = 104579 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (628861) 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, 1117 + ... + 1582.

It is an arithmetic number, because the mean of its divisors is an integer number (157950).

2⁶²⁸⁸⁶⁷ is an apocalyptic number.

628867 is a deficient number, since it is larger than the sum of its proper divisors (2933).

628867 is a wasteful number, since it uses less digits than its factorization.

628867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932.

The product of its digits is 32256, while the sum is 37.

The square root of 628867 is about 793.0113492252. The cubic root of 628867 is about 85.6747676298.

The spelling of 628867 in words is "six hundred twenty-eight thousand, eight hundred sixty-seven".