340340 has 96 divisors (see below), whose sum is σ = 1016064. Its totient is φ = 92160.

The previous prime is 340339. The next prime is 340369. The reversal of 340340 is 43043.

340340 is nontrivially palindromic in base 9.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20012 + ... + 20028.

It is an arithmetic number, because the mean of its divisors is an integer number (10584).

2³⁴⁰³⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508032).

340340 is an abundant number, since it is smaller than the sum of its proper divisors (675724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

340340 is a wasteful number, since it uses less digits than its factorization.

340340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 340340 is about 583.3866642288. The cubic root of 340340 is about 69.8185778252.

340340 divided by its sum of digits (14) gives a triangular number (24310 = T₂₂₀).

Adding to 340340 its reverse (43043), we get a palindrome (383383).

It can be divided in two parts, 3403 and 40, that added together give a palindrome (3443).

The spelling of 340340 in words is "three hundred forty thousand, three hundred forty", and thus it is an iban number.