386665 has 8 divisors (see below), whose sum is σ = 491400. Its totient is φ = 291072.

The previous prime is 386651. The next prime is 386677. The reversal of 386665 is 566683.

It can be written as a sum of positive squares in 4 ways, for example, as 120409 + 266256 = 347^2 + 516^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 386665 - 2⁷ = 386537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 386665.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2190 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (61425).

2³⁸⁶⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

386665 is a deficient number, since it is larger than the sum of its proper divisors (104735).

386665 is a wasteful number, since it uses less digits than its factorization.

386665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571.

The product of its digits is 25920, while the sum is 34.

The square root of 386665 is about 621.8239300638. The cubic root of 386665 is about 72.8525829701.

It can be divided in two parts, 3 and 86665, that added together give a palindrome (86668).

The spelling of 386665 in words is "three hundred eighty-six thousand, six hundred sixty-five".