1340431400440 has 64 divisors (see below), whose sum is σ = 3291071938560. Its totient is φ = 487292987520.

The previous prime is 1340431400437. The next prime is 1340431400491. The reversal of 1340431400440 is 440041340431.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1340431400399 and 1340431400408.

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, 1151397 + ... + 2001643.

It is an arithmetic number, because the mean of its divisors is an integer number (51422999040).

Almost surely, 2^{1340431400440} is an apocalyptic number.

1340431400440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340431400440 is an abundant number, since it is smaller than the sum of its proper divisors (1950640538120).

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

1340431400440 is a wasteful number, since it uses less digits than its factorization.

1340431400440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853852 (or 853848 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1340431400440 its reverse (440041340431), we get a palindrome (1780472740871).

The spelling of 1340431400440 in words is "one trillion, three hundred forty billion, four hundred thirty-one million, four hundred thousand, four hundred forty".