680779356 has 48 divisors (see below), whose sum is σ = 1601873280. Its totient is φ = 225023680.

The previous prime is 680779343. The next prime is 680779357. The reversal of 680779356 is 653977086.

It is a junction number, because it is equal to n+sod(n) for n = 680779299 and 680779308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680779357) 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, 1337230 + ... + 1337738.

It is an arithmetic number, because the mean of its divisors is an integer number (33372360).

Almost surely, 2^680779356 is an apocalyptic number.

It is an amenable number.

680779356 is an abundant number, since it is smaller than the sum of its proper divisors (921093924).

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

680779356 is a wasteful number, since it uses less digits than its factorization.

680779356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The square root of 680779356 is about 26091.7488106873. The cubic root of 680779356 is about 879.7017567153.

The spelling of 680779356 in words is "six hundred eighty million, seven hundred seventy-nine thousand, three hundred fifty-six".