340445 has 16 divisors (see below), whose sum is σ = 476928. Its totient is φ = 228480.

The previous prime is 340429. The next prime is 340447. The reversal of 340445 is 544043.

It is a happy number.

It is not a de Polignac number, because 340445 - 2⁴ = 340429 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 (340447) 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 15 ways as a sum of consecutive naturals, for example, 2417 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (29808).

2³⁴⁰⁴⁴⁵ is an apocalyptic number.

340445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

340445 is a deficient number, since it is larger than the sum of its proper divisors (136483).

340445 is a wasteful number, since it uses less digits than its factorization.

340445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 340445 is about 583.4766490615. The cubic root of 340445 is about 69.8257571134.

Adding to 340445 its reverse (544043), we get a palindrome (884488).

The spelling of 340445 in words is "three hundred forty thousand, four hundred forty-five".