1340243140 has 12 divisors (see below), whose sum is σ = 2814510636. Its totient is φ = 536097248.

The previous prime is 1340243131. The next prime is 1340243153. The reversal of 1340243140 is 413420431.

It can be written as a sum of positive squares in 2 ways, for example, as 426752964 + 913490176 = 20658^2 + 30224^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 33506059 + ... + 33506098.

It is an arithmetic number, because the mean of its divisors is an integer number (234542553).

Almost surely, 2^1340243140 is an apocalyptic number.

1340243140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340243140 is an abundant number, since it is smaller than the sum of its proper divisors (1474267496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340243140 is a wasteful number, since it uses less digits than its factorization.

1340243140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67012166 (or 67012164 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1340243140 is about 36609.3313241310. The cubic root of 1340243140 is about 1102.5404478830.

Adding to 1340243140 its reverse (413420431), we get a palindrome (1753663571).

The spelling of 1340243140 in words is "one billion, three hundred forty million, two hundred forty-three thousand, one hundred forty".