340220323 has 4 divisors (see below), whose sum is σ = 340456248. Its totient is φ = 339984400.

The previous prime is 340220299. The next prime is 340220329. The reversal of 340220323 is 323022043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 340220323 - 2⁹ = 340219811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340220323.

It is not an unprimeable number, because it can be changed into a prime (340220329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115786 + ... + 118687.

It is an arithmetic number, because the mean of its divisors is an integer number (85114062).

Almost surely, 2^340220323 is an apocalyptic number.

340220323 is a deficient number, since it is larger than the sum of its proper divisors (235925).

340220323 is a wasteful number, since it uses less digits than its factorization.

340220323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235924.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 340220323 is about 18445.0622931992. The cubic root of 340220323 is about 698.1039320830.

Adding to 340220323 its reverse (323022043), we get a palindrome (663242366).

The spelling of 340220323 in words is "three hundred forty million, two hundred twenty thousand, three hundred twenty-three".