1340005440 has 56 divisors (see below), whose sum is σ = 4254520320. Its totient is φ = 357334528.

The previous prime is 1340005423. The next prime is 1340005441. The reversal of 1340005440 is 445000431.

It is a super-2 number, since 2×1340005440² = 3591229158459187200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1340005441) 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 7 ways as a sum of consecutive naturals, for example, 696960 + ... + 698879.

Almost surely, 2^1340005440 is an apocalyptic number.

1340005440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340005440 is an abundant number, since it is smaller than the sum of its proper divisors (2914514880).

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

1340005440 is a wasteful number, since it uses less digits than its factorization.

1340005440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395859 (or 1395849 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1340005440 is about 36606.0847401084. The cubic root of 1340005440 is about 1102.4752633525.

Adding to 1340005440 its reverse (445000431), we get a palindrome (1785005871).

The spelling of 1340005440 in words is "one billion, three hundred forty million, five thousand, four hundred forty".