1340342320 has 20 divisors (see below), whose sum is σ = 3116296080. Its totient is φ = 536136896.

The previous prime is 1340342291. The next prime is 1340342321. The reversal of 1340342320 is 232430431.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1340342291 and 1340342300.

It is not an unprimeable number, because it can be changed into a prime (1340342321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8377060 + ... + 8377219.

It is an arithmetic number, because the mean of its divisors is an integer number (155814804).

Almost surely, 2^1340342320 is an apocalyptic number.

1340342320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340342320 is an abundant number, since it is smaller than the sum of its proper divisors (1775953760).

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

1340342320 is a wasteful number, since it uses less digits than its factorization.

1340342320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16754292 (or 16754286 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 1340342320 is about 36610.6858717506. The cubic root of 1340342320 is about 1102.5676437604.

Adding to 1340342320 its reverse (232430431), we get a palindrome (1572772751).

The spelling of 1340342320 in words is "one billion, three hundred forty million, three hundred forty-two thousand, three hundred twenty".