340518865 has 4 divisors (see below), whose sum is σ = 408622644. Its totient is φ = 272415088.

The previous prime is 340518863. The next prime is 340518869. The reversal of 340518865 is 568815043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568815043 = 1427 ⋅398609.

It can be written as a sum of positive squares in 2 ways, for example, as 72607441 + 267911424 = 8521^2 + 16368^2 .

It is a cyclic number.

It is not a de Polignac number, because 340518865 - 2¹ = 340518863 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340518863) 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, 34051882 + ... + 34051891.

It is an arithmetic number, because the mean of its divisors is an integer number (102155661).

Almost surely, 2^340518865 is an apocalyptic number.

It is an amenable number.

340518865 is a deficient number, since it is larger than the sum of its proper divisors (68103779).

340518865 is an equidigital number, since it uses as much as digits as its factorization.

340518865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68103778.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 340518865 is about 18453.1532535770. The cubic root of 340518865 is about 698.3080668736.

The spelling of 340518865 in words is "three hundred forty million, five hundred eighteen thousand, eight hundred sixty-five".