1340140323 has 8 divisors (see below), whose sum is σ = 1844494336. Its totient is φ = 864606600.

The previous prime is 1340140303. The next prime is 1340140387. The reversal of 1340140323 is 3230410431.

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

It is a de Polignac number, because none of the positive numbers 2^k-1340140323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340140323.

It is not an unprimeable number, because it can be changed into a prime (1340140303) 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, 7204963 + ... + 7205148.

It is an arithmetic number, because the mean of its divisors is an integer number (230561792).

Almost surely, 2^1340140323 is an apocalyptic number.

1340140323 is a deficient number, since it is larger than the sum of its proper divisors (504354013).

1340140323 is a wasteful number, since it uses less digits than its factorization.

1340140323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14410145.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1340140323 is about 36607.9270513915. The cubic root of 1340140323 is about 1102.5122532973.

Adding to 1340140323 its reverse (3230410431), we get a palindrome (4570550754).

The spelling of 1340140323 in words is "one billion, three hundred forty million, one hundred forty thousand, three hundred twenty-three".