386688685 has 4 divisors (see below), whose sum is σ = 464026428. Its totient is φ = 309350944.

The previous prime is 386688661. The next prime is 386688707. The reversal of 386688685 is 586886683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49378729 + 337309956 = 7027^2 + 18366^2 .

It is a cyclic number.

It is not a de Polignac number, because 386688685 - 2¹³ = 386680493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38668864 + ... + 38668873.

It is an arithmetic number, because the mean of its divisors is an integer number (116006607).

Almost surely, 2^386688685 is an apocalyptic number.

It is an amenable number.

386688685 is a deficient number, since it is larger than the sum of its proper divisors (77337743).

386688685 is an equidigital number, since it uses as much as digits as its factorization.

386688685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77337742.

The product of its digits is 13271040, while the sum is 58.

The square root of 386688685 is about 19664.4014655926. The cubic root of 386688685 is about 728.5407045776.

The spelling of 386688685 in words is "three hundred eighty-six million, six hundred eighty-eight thousand, six hundred eighty-five".