240839 has 8 divisors (see below), whose sum is σ = 263808. Its totient is φ = 218880.

The previous prime is 240829. The next prime is 240841. The reversal of 240839 is 938042.

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 240839 - 2¹⁶ = 175303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240829) 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 7 ways as a sum of consecutive naturals, for example, 299 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (32976).

2²⁴⁰⁸³⁹ is an apocalyptic number.

240839 is a deficient number, since it is larger than the sum of its proper divisors (22969).

240839 is a wasteful number, since it uses less digits than its factorization.

240839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 240839 is about 490.7535022799. The cubic root of 240839 is about 62.2169816779.

The spelling of 240839 in words is "two hundred forty thousand, eight hundred thirty-nine".