1340768686 has 16 divisors (see below), whose sum is σ = 2040806880. Its totient is φ = 660512160.

The previous prime is 1340768683. The next prime is 1340768701. The reversal of 1340768686 is 6868670431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340768683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429700 + ... + 432808.

It is an arithmetic number, because the mean of its divisors is an integer number (127550430).

Almost surely, 2^1340768686 is an apocalyptic number.

1340768686 is a deficient number, since it is larger than the sum of its proper divisors (700038194).

1340768686 is a wasteful number, since it uses less digits than its factorization.

1340768686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 1340768686 is about 36616.5083807837. The cubic root of 1340768686 is about 1102.6845411409.

The spelling of 1340768686 in words is "one billion, three hundred forty million, seven hundred sixty-eight thousand, six hundred eighty-six".