340306643 has 8 divisors (see below), whose sum is σ = 355453728. Its totient is φ = 325188864.

The previous prime is 340306639. The next prime is 340306657. The reversal of 340306643 is 346603043.

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 340306643 - 2² = 340306639 is a prime.

It is a super-2 number, since 2×340306643² = 231617222539858898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340306633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18371 + ... + 31907.

It is an arithmetic number, because the mean of its divisors is an integer number (44431716).

Almost surely, 2^340306643 is an apocalyptic number.

340306643 is a deficient number, since it is larger than the sum of its proper divisors (15147085).

340306643 is a wasteful number, since it uses less digits than its factorization.

340306643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14653.

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 340306643 is about 18447.4020664157. The cubic root of 340306643 is about 698.1629675881.

Adding to 340306643 its reverse (346603043), we get a palindrome (686909686).

The spelling of 340306643 in words is "three hundred forty million, three hundred six thousand, six hundred forty-three".