239806 has 12 divisors (see below), whose sum is σ = 418608. Its totient is φ = 102732.

The previous prime is 239803. The next prime is 239807. The reversal of 239806 is 608932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239803) 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 5 ways as a sum of consecutive naturals, for example, 1126 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (34884).

2²³⁹⁸⁰⁶ is an apocalyptic number.

239806 is a deficient number, since it is larger than the sum of its proper divisors (178802).

239806 is a wasteful number, since it uses less digits than its factorization.

239806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463 (or 2456 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 239806 is about 489.6999081070. The cubic root of 239806 is about 62.1279010746.

Subtracting from 239806 its sum of digits (28), we obtain a triangular number (239778 = T₆₉₂).

The spelling of 239806 in words is "two hundred thirty-nine thousand, eight hundred six".