686959830 has 96 divisors (see below), whose sum is σ = 1890963360. Its totient is φ = 172730880.

The previous prime is 686959829. The next prime is 686959831. The reversal of 686959830 is 38959686.

686959830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (686959829) and next prime (686959831).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686959831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109170 + ... + 115290.

It is an arithmetic number, because the mean of its divisors is an integer number (19697535).

Almost surely, 2^686959830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686959830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945481680).

686959830 is an abundant number, since it is smaller than the sum of its proper divisors (1204003530).

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

686959830 is a wasteful number, since it uses less digits than its factorization.

686959830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6206 (or 6203 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 686959830 is about 26209.9185424144. The cubic root of 686959830 is about 882.3558731746.

The spelling of 686959830 in words is "six hundred eighty-six million, nine hundred fifty-nine thousand, eight hundred thirty".