680628 has 24 divisors (see below), whose sum is σ = 1710688. Its totient is φ = 209376.

The previous prime is 680623. The next prime is 680633. The reversal of 680628 is 826086.

It is an interprime number because it is at equal distance from previous prime (680623) and next prime (680633).

It is a junction number, because it is equal to n+sod(n) for n = 680595 and 680604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680623) by changing a digit.

680628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2026 + ... + 2337.

2⁶⁸⁰⁶²⁸ is an apocalyptic number.

It is an amenable number.

680628 is an abundant number, since it is smaller than the sum of its proper divisors (1030060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680628 is a wasteful number, since it uses less digits than its factorization.

680628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383 (or 4381 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 680628 is about 825.0018181798. The cubic root of 680628 is about 87.9636557907.

The spelling of 680628 in words is "six hundred eighty thousand, six hundred twenty-eight".