680000 has 70 divisors (see below), whose sum is σ = 1785366. Its totient is φ = 256000.

The previous prime is 679999. The next prime is 680003. The reversal of 680000 is 86.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 173056 + 506944 = 416^2 + 712^2 .

It is not an unprimeable number, because it can be changed into a prime (680003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39992 + ... + 40008.

2⁶⁸⁰⁰⁰⁰ 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 680000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892683).

680000 is an abundant number, since it is smaller than the sum of its proper divisors (1105366).

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

680000 is an equidigital number, since it uses as much as digits as its factorization.

680000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 680000 is about 824.6211251235. The cubic root of 680000 is about 87.9365934432.

Adding to 680000 its reverse (86), we get a palindrome (680086).

The spelling of 680000 in words is "six hundred eighty thousand".