340304321 has 16 divisors (see below), whose sum is σ = 393969408. Its totient is φ = 287928000.

The previous prime is 340304311. The next prime is 340304339. The reversal of 340304321 is 123403043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340304321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340304293 and 340304302.

It is not an unprimeable number, because it can be changed into a prime (340304311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181931 + ... + 183791.

It is an arithmetic number, because the mean of its divisors is an integer number (24623088).

Almost surely, 2^340304321 is an apocalyptic number.

It is an amenable number.

340304321 is a deficient number, since it is larger than the sum of its proper divisors (53665087).

340304321 is a wasteful number, since it uses less digits than its factorization.

340304321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 340304321 is about 18447.3391306172. The cubic root of 340304321 is about 698.1613796691.

Adding to 340304321 its reverse (123403043), we get a palindrome (463707364).

The spelling of 340304321 in words is "three hundred forty million, three hundred four thousand, three hundred twenty-one".