686818382 has 8 divisors (see below), whose sum is σ = 1040428152. Its totient is φ = 340009000.

The previous prime is 686818381. The next prime is 686818393. The reversal of 686818382 is 283818686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 686818382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686818381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699844 + ... + 1700247.

It is an arithmetic number, because the mean of its divisors is an integer number (130053519).

Almost surely, 2^686818382 is an apocalyptic number.

686818382 is a deficient number, since it is larger than the sum of its proper divisors (353609770).

686818382 is a wasteful number, since it uses less digits than its factorization.

686818382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400194.

The product of its digits is 884736, while the sum is 50.

The square root of 686818382 is about 26207.2200357077. The cubic root of 686818382 is about 882.2953087208.

The spelling of 686818382 in words is "six hundred eighty-six million, eight hundred eighteen thousand, three hundred eighty-two".