680140 has 24 divisors (see below), whose sum is σ = 1475712. Its totient is φ = 263040.

The previous prime is 680129. The next prime is 680159. The reversal of 680140 is 41086.

It is an unprimeable number.

680140 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, 72 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (61488).

2⁶⁸⁰¹⁴⁰ 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 680140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737856).

680140 is an abundant number, since it is smaller than the sum of its proper divisors (795572).

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

680140 is a wasteful number, since it uses less digits than its factorization.

680140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 680140 is about 824.7060082235. The cubic root of 680140 is about 87.9426278933.

It can be divided in two parts, 680 and 140, that added together give a triangular number (820 = T₄₀).

The spelling of 680140 in words is "six hundred eighty thousand, one hundred forty".