1340443420340 has 24 divisors (see below), whose sum is σ = 2814963799200. Its totient is φ = 536171155488.

The previous prime is 1340443420291. The next prime is 1340443420367. The reversal of 1340443420340 is 430243440431.

It is a junction number, because it is equal to n+sod(n) for n = 1340443420297 and 1340443420306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1639139 + ... + 2316821.

It is an arithmetic number, because the mean of its divisors is an integer number (117290158300).

Almost surely, 2^{1340443420340} is an apocalyptic number.

1340443420340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340443420340 is an abundant number, since it is smaller than the sum of its proper divisors (1474520378860).

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

1340443420340 is a wasteful number, since it uses less digits than its factorization.

1340443420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776591 (or 776589 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 1340443420340 its reverse (430243440431), we get a palindrome (1770686860771).

The spelling of 1340443420340 in words is "one trillion, three hundred forty billion, four hundred forty-three million, four hundred twenty thousand, three hundred forty".