385239 has 4 divisors (see below), whose sum is σ = 513656. Its totient is φ = 256824.

The previous prime is 385223. The next prime is 385249. The reversal of 385239 is 932583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932583 = 3 ⋅310861.

It is not a de Polignac number, because 385239 - 2⁴ = 385223 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385249) 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, 64204 + ... + 64209.

It is an arithmetic number, because the mean of its divisors is an integer number (128414).

2³⁸⁵²³⁹ is an apocalyptic number.

385239 is a deficient number, since it is larger than the sum of its proper divisors (128417).

385239 is a wasteful number, since it uses less digits than its factorization.

385239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128416.

The product of its digits is 6480, while the sum is 30.

The square root of 385239 is about 620.6762441080. The cubic root of 385239 is about 72.7629138280.

The spelling of 385239 in words is "three hundred eighty-five thousand, two hundred thirty-nine".