340439 has 4 divisors (see below), whose sum is σ = 371400. Its totient is φ = 309480.

The previous prime is 340429. The next prime is 340447. The reversal of 340439 is 934043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934043 = 11 ⋅84913.

It is a cyclic number.

It is not a de Polignac number, because 340439 - 2⁸ = 340183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340439.

It is not an unprimeable number, because it can be changed into a prime (340409) 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, 15464 + ... + 15485.

It is an arithmetic number, because the mean of its divisors is an integer number (92850).

2³⁴⁰⁴³⁹ is an apocalyptic number.

340439 is a deficient number, since it is larger than the sum of its proper divisors (30961).

340439 is a wasteful number, since it uses less digits than its factorization.

340439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30960.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 340439 is about 583.4715074449. The cubic root of 340439 is about 69.8253469082.

It can be divided in two parts, 3404 and 39, that added together give a palindrome (3443).

The spelling of 340439 in words is "three hundred forty thousand, four hundred thirty-nine".