680056 has 24 divisors (see below), whose sum is σ = 1383480. Its totient is φ = 313248.

The previous prime is 680039. The next prime is 680059. The reversal of 680056 is 650086.

It is a self number, because there is not a number n which added to its sum of digits gives 680056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680059) by changing a digit.

680056 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 5 ways as a sum of consecutive naturals, for example, 1101 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (57645).

2⁶⁸⁰⁰⁵⁶ 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 680056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691740).

680056 is an abundant number, since it is smaller than the sum of its proper divisors (703424).

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

680056 is a wasteful number, since it uses less digits than its factorization.

680056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 518 counting only the distinct ones).

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

The square root of 680056 is about 824.6550794120. The cubic root of 680056 is about 87.9390073226.

The spelling of 680056 in words is "six hundred eighty thousand, fifty-six".