1340400040406 has 16 divisors (see below), whose sum is σ = 2297843751840. Its totient is φ = 574453382400.

The previous prime is 1340400040381. The next prime is 1340400040423. The reversal of 1340400040406 is 6040400040431.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3408800 + ... + 3781628.

It is an arithmetic number, because the mean of its divisors is an integer number (143615234490).

Almost surely, 2^{1340400040406} is an apocalyptic number.

1340400040406 is a deficient number, since it is larger than the sum of its proper divisors (957443711434).

1340400040406 is a wasteful number, since it uses less digits than its factorization.

1340400040406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629639.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1340400040406 its reverse (6040400040431), we get a palindrome (7380800080837).

The spelling of 1340400040406 in words is "one trillion, three hundred forty billion, four hundred million, forty thousand, four hundred six".