340305 has 24 divisors (see below), whose sum is σ = 634752. Its totient is φ = 155232.

The previous prime is 340297. The next prime is 340321. The reversal of 340305 is 503043.

It is not a de Polignac number, because 340305 - 2³ = 340297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a d-powerful number, because it can be written as 3² + 4⁹ + 3³ + 0 + 0 + 5⁷ .

It is a Curzon number.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340305.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504 + ... + 966.

It is an arithmetic number, because the mean of its divisors is an integer number (26448).

2³⁴⁰³⁰⁵ is an apocalyptic number.

340305 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

340305 is a deficient number, since it is larger than the sum of its proper divisors (294447).

340305 is a wasteful number, since it uses less digits than its factorization.

340305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 340305 is about 583.3566662000. The cubic root of 340305 is about 69.8161844010.

Adding to 340305 its reverse (503043), we get a palindrome (843348).

The spelling of 340305 in words is "three hundred forty thousand, three hundred five".