686354382 has 48 divisors (see below), whose sum is σ = 1711992672. Its totient is φ = 194664960.

The previous prime is 686354363. The next prime is 686354387. The reversal of 686354382 is 283453686.

It is a happy number.

686354382 is a `hidden beast` number, since 6 + 8 + 635 + 4 + 3 + 8 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686354387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2619 + ... + 37142.

It is an arithmetic number, because the mean of its divisors is an integer number (35666514).

Almost surely, 2^686354382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686354382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855996336).

686354382 is an abundant number, since it is smaller than the sum of its proper divisors (1025638290).

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

686354382 is a wasteful number, since it uses less digits than its factorization.

686354382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39913 (or 39910 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 686354382 is about 26198.3660177500. The cubic root of 686354382 is about 882.0965772661.

The spelling of 686354382 in words is "six hundred eighty-six million, three hundred fifty-four thousand, three hundred eighty-two".