1331040432340 has 96 divisors (see below), whose sum is σ = 3096930945024. Its totient is φ = 478289940480.

The previous prime is 1331040432329. The next prime is 1331040432461. The reversal of 1331040432340 is 432340401331.

It is a junction number, because it is equal to n+sod(n) for n = 1331040432299 and 1331040432308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95544 + ... + 1634383.

It is an arithmetic number, because the mean of its divisors is an integer number (32259697344).

Almost surely, 2^{1331040432340} is an apocalyptic number.

1331040432340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331040432340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548465472512).

1331040432340 is an abundant number, since it is smaller than the sum of its proper divisors (1765890512684).

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

1331040432340 is a wasteful number, since it uses less digits than its factorization.

1331040432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730057 (or 1730055 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 1331040432340 its reverse (432340401331), we get a palindrome (1763380833671).

The spelling of 1331040432340 in words is "one trillion, three hundred thirty-one billion, forty million, four hundred thirty-two thousand, three hundred forty".