386639 has 4 divisors (see below), whose sum is σ = 421800. Its totient is φ = 351480.

The previous prime is 386629. The next prime is 386641. The reversal of 386639 is 936683.

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

It is a cyclic number.

It is not a de Polignac number, because 386639 - 2⁸ = 386383 is a prime.

It is a d-powerful number, because it can be written as 3⁹ + 8³ + 6⁵ + 6⁷ + 3⁹ + 9⁵ .

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 386599 and 386608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17564 + ... + 17585.

It is an arithmetic number, because the mean of its divisors is an integer number (105450).

2³⁸⁶⁶³⁹ is an apocalyptic number.

386639 is a deficient number, since it is larger than the sum of its proper divisors (35161).

386639 is a wasteful number, since it uses less digits than its factorization.

386639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35160.

The product of its digits is 23328, while the sum is 35.

The square root of 386639 is about 621.8030234729. The cubic root of 386639 is about 72.8509500238.

The spelling of 386639 in words is "three hundred eighty-six thousand, six hundred thirty-nine".