680121280 has 56 divisors (see below), whose sum is σ = 1626443280. Its totient is φ = 270888960.

The previous prime is 680121271. The next prime is 680121289. The reversal of 680121280 is 82121086.

It is an interprime number because it is at equal distance from previous prime (680121271) and next prime (680121289).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680121289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72711 + ... + 81529.

It is an arithmetic number, because the mean of its divisors is an integer number (29043630).

Almost surely, 2^680121280 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 680121280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813221640).

680121280 is an abundant number, since it is smaller than the sum of its proper divisors (946322000).

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

680121280 is a wasteful number, since it uses less digits than its factorization.

680121280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077 (or 9067 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 680121280 is about 26079.1349549789. The cubic root of 680121280 is about 879.4182104908.

The spelling of 680121280 in words is "six hundred eighty million, one hundred twenty-one thousand, two hundred eighty".