1340408213 has 16 divisors (see below), whose sum is σ = 1406522880. Its totient is φ = 1276007616.

The previous prime is 1340408183. The next prime is 1340408221. The reversal of 1340408213 is 3128040431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340408213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340408243) 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, 938606 + ... + 940032.

It is an arithmetic number, because the mean of its divisors is an integer number (87907680).

Almost surely, 2^1340408213 is an apocalyptic number.

It is an amenable number.

1340408213 is a deficient number, since it is larger than the sum of its proper divisors (66114667).

1340408213 is a wasteful number, since it uses less digits than its factorization.

1340408213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1340408213 is about 36611.5857755438. The cubic root of 1340408213 is about 1102.5857113585.

Adding to 1340408213 its reverse (3128040431), we get a palindrome (4468448644).

The spelling of 1340408213 in words is "one billion, three hundred forty million, four hundred eight thousand, two hundred thirteen".