1340012440 has 64 divisors (see below), whose sum is σ = 3322519200. Its totient is φ = 483259392.

The previous prime is 1340012431. The next prime is 1340012447. The reversal of 1340012440 is 442100431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340012447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7605 + ... + 52324.

Almost surely, 2^1340012440 is an apocalyptic number.

1340012440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340012440 is an abundant number, since it is smaller than the sum of its proper divisors (1982506760).

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

1340012440 is a wasteful number, since it uses less digits than its factorization.

1340012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59996 (or 59992 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1340012440 is about 36606.1803525033. The cubic root of 1340012440 is about 1102.4771830744.

Adding to 1340012440 its reverse (442100431), we get a palindrome (1782112871).

The spelling of 1340012440 in words is "one billion, three hundred forty million, twelve thousand, four hundred forty".