680809340 has 24 divisors (see below), whose sum is σ = 1434369552. Its totient is φ = 271434240.

The previous prime is 680809333. The next prime is 680809357. The reversal of 680809340 is 43908086.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 680809294 and 680809303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49301 + ... + 61580.

It is an arithmetic number, because the mean of its divisors is an integer number (59765398).

Almost surely, 2^680809340 is an apocalyptic number.

It is an amenable number.

680809340 is an abundant number, since it is smaller than the sum of its proper divisors (753560212).

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

680809340 is a wasteful number, since it uses less digits than its factorization.

680809340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111197 (or 111195 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 680809340 is about 26092.3233921397. The cubic root of 680809340 is about 879.7146716145.

The spelling of 680809340 in words is "six hundred eighty million, eight hundred nine thousand, three hundred forty".