1340830809 has 12 divisors (see below), whose sum is σ = 1948355136. Its totient is φ = 888533592.

The previous prime is 1340830807. The next prime is 1340830819. The reversal of 1340830809 is 9080380431.

1340830809 is a `hidden beast` number, since 1 + 340 + 8 + 308 + 0 + 9 = 666.

It is not a de Polignac number, because 1340830809 - 2¹ = 1340830807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340830801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444549 + ... + 447554.

It is an arithmetic number, because the mean of its divisors is an integer number (162362928).

Almost surely, 2^1340830809 is an apocalyptic number.

It is an amenable number.

1340830809 is a deficient number, since it is larger than the sum of its proper divisors (607524327).

1340830809 is a wasteful number, since it uses less digits than its factorization.

1340830809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892276 (or 892273 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1340830809 is about 36617.3566632000. The cubic root of 1340830809 is about 1102.7015714247.

The spelling of 1340830809 in words is "one billion, three hundred forty million, eight hundred thirty thousand, eight hundred nine".