680385436 has 6 divisors (see below), whose sum is σ = 1190674520. Its totient is φ = 340192716.

The previous prime is 680385413. The next prime is 680385437. The reversal of 680385436 is 634583086.

It is a junction number, because it is equal to n+sod(n) for n = 680385392 and 680385401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680385437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85048176 + ... + 85048183.

Almost surely, 2^680385436 is an apocalyptic number.

It is an amenable number.

680385436 is a deficient number, since it is larger than the sum of its proper divisors (510289084).

680385436 is a wasteful number, since it uses less digits than its factorization.

680385436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170096363 (or 170096361 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 680385436 is about 26084.1989717913. The cubic root of 680385436 is about 879.5320497598.

The spelling of 680385436 in words is "six hundred eighty million, three hundred eighty-five thousand, four hundred thirty-six".