680727940 has 36 divisors (see below), whose sum is σ = 1518577956. Its totient is φ = 256271872.

The previous prime is 680727937. The next prime is 680727997. The reversal of 680727940 is 49727086.

It can be written as a sum of positive squares in 6 ways, for example, as 10125124 + 670602816 = 3182^2 + 25896^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 53107 + ... + 64666.

It is an arithmetic number, because the mean of its divisors is an integer number (42182721).

Almost surely, 2^680727940 is an apocalyptic number.

It is an amenable number.

680727940 is an abundant number, since it is smaller than the sum of its proper divisors (837850016).

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

680727940 is a wasteful number, since it uses less digits than its factorization.

680727940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117816 (or 117797 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 680727940 is about 26090.7634997522. The cubic root of 680727940 is about 879.6796096061.

The spelling of 680727940 in words is "six hundred eighty million, seven hundred twenty-seven thousand, nine hundred forty".