340402321 has 8 divisors (see below), whose sum is σ = 392001984. Its totient is φ = 289545360.

The previous prime is 340402273. The next prime is 340402327. The reversal of 340402321 is 123204043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 340402321 - 2¹³ = 340394129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340402327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184690 + ... + 186523.

It is an arithmetic number, because the mean of its divisors is an integer number (49000248).

Almost surely, 2^340402321 is an apocalyptic number.

It is an amenable number.

340402321 is a deficient number, since it is larger than the sum of its proper divisors (51599663).

340402321 is a wasteful number, since it uses less digits than its factorization.

340402321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371351.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 340402321 is about 18449.9951490509. The cubic root of 340402321 is about 698.2283915016.

Adding to 340402321 its reverse (123204043), we get a palindrome (463606364).

The spelling of 340402321 in words is "three hundred forty million, four hundred two thousand, three hundred twenty-one".