680560 has 40 divisors (see below), whose sum is σ = 1624896. Its totient is φ = 264960.

The previous prime is 680539. The next prime is 680567. The reversal of 680560 is 65086.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680567) by changing a digit.

680560 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, 3670 + ... + 3850.

2⁶⁸⁰⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812448).

680560 is an abundant number, since it is smaller than the sum of its proper divisors (944336).

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

680560 is a wasteful number, since it uses less digits than its factorization.

680560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 680560 is about 824.9606051200. The cubic root of 680560 is about 87.9607262767.

The spelling of 680560 in words is "six hundred eighty thousand, five hundred sixty".