1340352305 has 32 divisors (see below), whose sum is σ = 1692381600. Its totient is φ = 1017741312.

The previous prime is 1340352281. The next prime is 1340352311. The reversal of 1340352305 is 5032530431.

It can be written as a sum of positive squares in 16 ways, for example, as 195748081 + 1144604224 = 13991^2 + 33832^2 .

It is not a de Polignac number, because 1340352305 - 2⁸ = 1340352049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3276941 + ... + 3277349.

It is an arithmetic number, because the mean of its divisors is an integer number (52886925).

Almost surely, 2^1340352305 is an apocalyptic number.

It is an amenable number.

1340352305 is a deficient number, since it is larger than the sum of its proper divisors (352029295).

1340352305 is a wasteful number, since it uses less digits than its factorization.

1340352305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 1340352305 is about 36610.8222387862. The cubic root of 1340352305 is about 1102.5703816457.

Adding to 1340352305 its reverse (5032530431), we get a palindrome (6372882736).

The spelling of 1340352305 in words is "one billion, three hundred forty million, three hundred fifty-two thousand, three hundred five".