680879650 has 24 divisors (see below), whose sum is σ = 1381567824. Its totient is φ = 247592400.

The previous prime is 680879561. The next prime is 680879653. The reversal of 680879650 is 56978086.

It is a junction number, because it is equal to n+sod(n) for n = 680879594 and 680879603.

It is not an unprimeable number, because it can be changed into a prime (680879653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 618432 + ... + 619531.

It is an arithmetic number, because the mean of its divisors is an integer number (57565326).

Almost surely, 2^680879650 is an apocalyptic number.

680879650 is an abundant number, since it is smaller than the sum of its proper divisors (700688174).

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

680879650 is a wasteful number, since it uses less digits than its factorization.

680879650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237986 (or 1237981 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 680879650 is about 26093.6706885022. The cubic root of 680879650 is about 879.7449544978.

The spelling of 680879650 in words is "six hundred eighty million, eight hundred seventy-nine thousand, six hundred fifty".