340340643 has 16 divisors (see below), whose sum is σ = 504618400. Its totient is φ = 226709280.

The previous prime is 340340641. The next prime is 340340647. The reversal of 340340643 is 346043043.

It is not a de Polignac number, because 340340643 - 2¹ = 340340641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340340641) 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, 34173 + ... + 42993.

It is an arithmetic number, because the mean of its divisors is an integer number (31538650).

Almost surely, 2^340340643 is an apocalyptic number.

340340643 is a deficient number, since it is larger than the sum of its proper divisors (164277757).

340340643 is a wasteful number, since it uses less digits than its factorization.

340340643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10259 (or 10253 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 340340643 is about 18448.3235823746. The cubic root of 340340643 is about 698.1862179427.

Adding to 340340643 its reverse (346043043), we get a palindrome (686383686).

The spelling of 340340643 in words is "three hundred forty million, three hundred forty thousand, six hundred forty-three".