680763840 has 112 divisors (see below), whose sum is σ = 2169212832. Its totient is φ = 180883456.

The previous prime is 680763817. The next prime is 680763841. The reversal of 680763840 is 48367086.

It is a junction number, because it is equal to n+sod(n) for n = 680763792 and 680763801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680763841) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 303202 + ... + 305438.

Almost surely, 2^680763840 is an apocalyptic number.

680763840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680763840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1084606416).

680763840 is an abundant number, since it is smaller than the sum of its proper divisors (1488448992).

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

680763840 is a wasteful number, since it uses less digits than its factorization.

680763840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 680763840 is about 26091.4514736149. The cubic root of 680763840 is about 879.6950734162.

The spelling of 680763840 in words is "six hundred eighty million, seven hundred sixty-three thousand, eight hundred forty".