1340342140 has 12 divisors (see below), whose sum is σ = 2814718536. Its totient is φ = 536136848.

The previous prime is 1340342011. The next prime is 1340342141. The reversal of 1340342140 is 412430431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340342141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33508534 + ... + 33508573.

It is an arithmetic number, because the mean of its divisors is an integer number (234559878).

Almost surely, 2^1340342140 is an apocalyptic number.

1340342140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340342140 is an abundant number, since it is smaller than the sum of its proper divisors (1474376396).

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

1340342140 is a wasteful number, since it uses less digits than its factorization.

1340342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67017116 (or 67017114 counting only the distinct ones).

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

The square root of 1340342140 is about 36610.6834134519. The cubic root of 1340342140 is about 1102.5675944043.

Adding to 1340342140 its reverse (412430431), we get a palindrome (1752772571).

The spelling of 1340342140 in words is "one billion, three hundred forty million, three hundred forty-two thousand, one hundred forty".