680220 has 36 divisors (see below), whose sum is σ = 2063880. Its totient is φ = 181344.

The previous prime is 680213. The next prime is 680237. The reversal of 680220 is 22086.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 680193 and 680202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1710 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (57330).

2⁶⁸⁰²²⁰ is an apocalyptic number.

680220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

680220 is an abundant number, since it is smaller than the sum of its proper divisors (1383660).

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

680220 is a wasteful number, since it uses less digits than its factorization.

680220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794 (or 3789 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 680220 is about 824.7545089298. The cubic root of 680220 is about 87.9460757787.

It can be divided in two parts, 680 and 220, that added together give a square (900 = 30²).

The spelling of 680220 in words is "six hundred eighty thousand, two hundred twenty".