1340423356 has 6 divisors (see below), whose sum is σ = 2345740880. Its totient is φ = 670211676.

The previous prime is 1340423351. The next prime is 1340423363. The reversal of 1340423356 is 6533240431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340423351) 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 as a sum of consecutive naturals, namely, 167552916 + ... + 167552923.

Almost surely, 2^1340423356 is an apocalyptic number.

It is an amenable number.

1340423356 is a deficient number, since it is larger than the sum of its proper divisors (1005317524).

1340423356 is a wasteful number, since it uses less digits than its factorization.

1340423356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335105843 (or 335105841 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 1340423356 is about 36611.7925810797. The cubic root of 1340423356 is about 1102.5898634252.

Adding to 1340423356 its reverse (6533240431), we get a palindrome (7873663787).

The spelling of 1340423356 in words is "one billion, three hundred forty million, four hundred twenty-three thousand, three hundred fifty-six".