340506 has 12 divisors (see below), whose sum is σ = 737802. Its totient is φ = 113496.

The previous prime is 340481. The next prime is 340519. The reversal of 340506 is 605043.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 245025 + 95481 = 495^2 + 309^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 18917 = 340506 / (3 + 4 + 0 + 5 + 0 + 6).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340506.

It is an unprimeable number.

340506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9441 + ... + 9476.

2³⁴⁰⁵⁰⁶ is an apocalyptic number.

340506 is an abundant number, since it is smaller than the sum of its proper divisors (397296).

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

340506 is a wasteful number, since it uses less digits than its factorization.

340506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18925 (or 18922 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 340506 is about 583.5289195918. The cubic root of 340506 is about 69.8299272602.

Adding to 340506 its reverse (605043), we get a palindrome (945549).

The spelling of 340506 in words is "three hundred forty thousand, five hundred six".