1340432340 has 48 divisors (see below), whose sum is σ = 4041921408. Its totient is φ = 329952384.

The previous prime is 1340432333. The next prime is 1340432369. The reversal of 1340432340 is 432340431.

It is a self number, because there is not a number n which added to its sum of digits gives 1340432340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 858472 + ... + 860031.

It is an arithmetic number, because the mean of its divisors is an integer number (84206696).

Almost surely, 2^1340432340 is an apocalyptic number.

1340432340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340432340 is an abundant number, since it is smaller than the sum of its proper divisors (2701489068).

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

1340432340 is a wasteful number, since it uses less digits than its factorization.

1340432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718528 (or 1718526 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1340432340 is about 36611.9152735827. The cubic root of 1340432340 is about 1102.5923267378.

Adding to 1340432340 its reverse (432340431), we get a palindrome (1772772771).

The spelling of 1340432340 in words is "one billion, three hundred forty million, four hundred thirty-two thousand, three hundred forty".