680442 has 32 divisors (see below), whose sum is σ = 1648512. Its totient is φ = 182784.

The previous prime is 680441. The next prime is 680443. The reversal of 680442 is 244086.

It is an interprime number because it is at equal distance from previous prime (680441) and next prime (680443).

It is not an unprimeable number, because it can be changed into a prime (680441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238 + ... + 1190.

It is an arithmetic number, because the mean of its divisors is an integer number (51516).

2⁶⁸⁰⁴⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824256).

680442 is an abundant number, since it is smaller than the sum of its proper divisors (968070).

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

680442 is a wasteful number, since it uses less digits than its factorization.

680442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 680442 is about 824.8890834530. The cubic root of 680442 is about 87.9556422451.

The spelling of 680442 in words is "six hundred eighty thousand, four hundred forty-two".