386439 has 4 divisors (see below), whose sum is σ = 515256. Its totient is φ = 257624.

The previous prime is 386437. The next prime is 386471. The reversal of 386439 is 934683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934683 = 3 ⋅311561.

It is a cyclic number.

It is not a de Polignac number, because 386439 - 2¹ = 386437 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386431) 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, 64404 + ... + 64409.

It is an arithmetic number, because the mean of its divisors is an integer number (128814).

2³⁸⁶⁴³⁹ is an apocalyptic number.

386439 is a deficient number, since it is larger than the sum of its proper divisors (128817).

386439 is a wasteful number, since it uses less digits than its factorization.

386439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128816.

The product of its digits is 15552, while the sum is 33.

The square root of 386439 is about 621.6421800361. The cubic root of 386439 is about 72.8383864498.

The spelling of 386439 in words is "three hundred eighty-six thousand, four hundred thirty-nine".