686027650 has 144 divisors (see below), whose sum is σ = 1629145728. Its totient is φ = 210355200.

The previous prime is 686027603. The next prime is 686027659. The reversal of 686027650 is 56720686.

686027650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (686027659) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4107867 + ... + 4108033.

It is an arithmetic number, because the mean of its divisors is an integer number (11313512).

Almost surely, 2^686027650 is an apocalyptic number.

686027650 is an abundant number, since it is smaller than the sum of its proper divisors (943118078).

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

686027650 is a wasteful number, since it uses less digits than its factorization.

686027650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 686027650 is about 26192.1295430517. The cubic root of 686027650 is about 881.9565840247.

The spelling of 686027650 in words is "six hundred eighty-six million, twenty-seven thousand, six hundred fifty".