680844938 has 8 divisors (see below), whose sum is σ = 1025727780. Its totient is φ = 338935680.

The previous prime is 680844911. The next prime is 680844947. The reversal of 680844938 is 839448086.

It can be written as a sum of positive squares in 2 ways, for example, as 680844649 + 289 = 26093^2 + 17^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742823 + ... + 743738.

Almost surely, 2^680844938 is an apocalyptic number.

680844938 is a deficient number, since it is larger than the sum of its proper divisors (344882842).

680844938 is a wasteful number, since it uses less digits than its factorization.

680844938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486792.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The square root of 680844938 is about 26093.0055378831. The cubic root of 680844938 is about 879.7300041191.

The spelling of 680844938 in words is "six hundred eighty million, eight hundred forty-four thousand, nine hundred thirty-eight".