396685686 has 16 divisors (see below), whose sum is σ = 835128000. Its totient is φ = 125269128.

The previous prime is 396685661. The next prime is 396685721. The reversal of 396685686 is 686586693.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1739736 + ... + 1739963.

It is an arithmetic number, because the mean of its divisors is an integer number (52195500).

Almost surely, 2^396685686 is an apocalyptic number.

396685686 is an abundant number, since it is smaller than the sum of its proper divisors (438442314).

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

396685686 is a wasteful number, since it uses less digits than its factorization.

396685686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479723.

The product of its digits is 11197440, while the sum is 57.

The square root of 396685686 is about 19916.9697996457. The cubic root of 396685686 is about 734.7656469751.

It can be divided in two parts, 39668 and 5686, that added together give a palindrome (45354).

The spelling of 396685686 in words is "three hundred ninety-six million, six hundred eighty-five thousand, six hundred eighty-six".