628671 has 8 divisors (see below), whose sum is σ = 841984. Its totient is φ = 417240.

The previous prime is 628651. The next prime is 628673. The reversal of 628671 is 176826.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 628671 - 2¹¹ = 626623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628671.

It is not an unprimeable number, because it can be changed into a prime (628673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816 + ... + 1386.

It is an arithmetic number, because the mean of its divisors is an integer number (105248).

2⁶²⁸⁶⁷¹ is an apocalyptic number.

628671 is a deficient number, since it is larger than the sum of its proper divisors (213313).

628671 is a wasteful number, since it uses less digits than its factorization.

628671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941.

The product of its digits is 4032, while the sum is 30.

The square root of 628671 is about 792.8877600266. The cubic root of 628671 is about 85.6658659069.

The spelling of 628671 in words is "six hundred twenty-eight thousand, six hundred seventy-one".