1340304140 has 48 divisors (see below), whose sum is σ = 3405955392. Its totient is φ = 432500736.

The previous prime is 1340304103. The next prime is 1340304143. The reversal of 1340304140 is 414030431.

It is a happy number.

It is a super-2 number, since 2×1340304140² = 3592830375402279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1340304143) 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 15 ways as a sum of consecutive naturals, for example, 279197 + ... + 283956.

It is an arithmetic number, because the mean of its divisors is an integer number (70957404).

Almost surely, 2^1340304140 is an apocalyptic number.

1340304140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340304140 is an abundant number, since it is smaller than the sum of its proper divisors (2065651252).

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

1340304140 is a wasteful number, since it uses less digits than its factorization.

1340304140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563186 (or 563184 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1340304140 is about 36610.1644355772. The cubic root of 1340304140 is about 1102.5571746855.

Adding to 1340304140 its reverse (414030431), we get a palindrome (1754334571).

The spelling of 1340304140 in words is "one billion, three hundred forty million, three hundred four thousand, one hundred forty".