628967 has 4 divisors (see below), whose sum is σ = 633696. Its totient is φ = 624240.

The previous prime is 628939. The next prime is 628973. The reversal of 628967 is 769826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 769826 = 2 ⋅384913.

It is a cyclic number.

It is not a de Polignac number, because 628967 - 2¹⁰ = 627943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628937) by changing a digit.

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, 2159 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (158424).

2⁶²⁸⁹⁶⁷ is an apocalyptic number.

628967 is a deficient number, since it is larger than the sum of its proper divisors (4729).

628967 is a wasteful number, since it uses less digits than its factorization.

628967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728.

The product of its digits is 36288, while the sum is 38.

The square root of 628967 is about 793.0743975189. The cubic root of 628967 is about 85.6793086126.

The spelling of 628967 in words is "six hundred twenty-eight thousand, nine hundred sixty-seven".