680121340 has 48 divisors (see below), whose sum is σ = 1555293600. Its totient is φ = 248838912.

The previous prime is 680121319. The next prime is 680121347. The reversal of 680121340 is 43121086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680121347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19839 + ... + 41878.

It is an arithmetic number, because the mean of its divisors is an integer number (32401950).

Almost surely, 2^680121340 is an apocalyptic number.

It is an amenable number.

680121340 is an abundant number, since it is smaller than the sum of its proper divisors (875172260).

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

680121340 is a wasteful number, since it uses less digits than its factorization.

680121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61774 (or 61772 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 680121340 is about 26079.1361053237. The cubic root of 680121340 is about 879.4182363514.

The spelling of 680121340 in words is "six hundred eighty million, one hundred twenty-one thousand, three hundred forty".