686388114 has 64 divisors (see below), whose sum is σ = 1551312000. Its totient is φ = 224928000.

The previous prime is 686388113. The next prime is 686388119. The reversal of 686388114 is 411883686.

It is a happy number.

686388114 is a `hidden beast` number, since 6 + 8 + 638 + 8 + 1 + 1 + 4 = 666.

686388114 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686388114² = 942257286080953992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686388114.

It is not an unprimeable number, because it can be changed into a prime (686388113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1206022 + ... + 1206590.

It is an arithmetic number, because the mean of its divisors is an integer number (24239250).

Almost surely, 2^686388114 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686388114, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775656000).

686388114 is an abundant number, since it is smaller than the sum of its proper divisors (864923886).

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

686388114 is a wasteful number, since it uses less digits than its factorization.

686388114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 914 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 686388114 is about 26199.0097904482. The cubic root of 686388114 is about 882.1110277186. Note that the first 3 decimals are identical.

The spelling of 686388114 in words is "six hundred eighty-six million, three hundred eighty-eight thousand, one hundred fourteen".