686388096 has 96 divisors (see below), whose sum is σ = 1981044000. Its totient is φ = 228114432.

The previous prime is 686388083. The next prime is 686388113. The reversal of 686388096 is 690883686.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×686388096² = 942257236661010432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 516585 + ... + 517911.

It is an arithmetic number, because the mean of its divisors is an integer number (20635875).

Almost surely, 2^686388096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686388096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990522000).

686388096 is an abundant number, since it is smaller than the sum of its proper divisors (1294655904).

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

686388096 is a wasteful number, since it uses less digits than its factorization.

686388096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 1781 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 686388096 is about 26199.0094469238. The cubic root of 686388096 is about 882.1110200077. Note that the first 3 decimals are identical.

The spelling of 686388096 in words is "six hundred eighty-six million, three hundred eighty-eight thousand, ninety-six".