1340630405 has 8 divisors (see below), whose sum is σ = 1693428000. Its totient is φ = 1016056656.

The previous prime is 1340630399. The next prime is 1340630419. The reversal of 1340630405 is 5040360431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340630405 - 2²⁰ = 1339581829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7055855 + ... + 7056044.

It is an arithmetic number, because the mean of its divisors is an integer number (211678500).

Almost surely, 2^1340630405 is an apocalyptic number.

It is an amenable number.

1340630405 is a deficient number, since it is larger than the sum of its proper divisors (352797595).

1340630405 is a wasteful number, since it uses less digits than its factorization.

1340630405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14111923.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1340630405 is about 36614.6200990806. The cubic root of 1340630405 is about 1102.6466311556.

Adding to 1340630405 its reverse (5040360431), we get a palindrome (6380990836).

The spelling of 1340630405 in words is "one billion, three hundred forty million, six hundred thirty thousand, four hundred five".