1320342140440 has 32 divisors (see below), whose sum is σ = 3043227620160. Its totient is φ = 515255468800.

The previous prime is 1320342140387. The next prime is 1320342140441. The reversal of 1320342140440 is 440412430231.

It is a junction number, because it is equal to n+sod(n) for n = 1320342140399 and 1320342140408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320342140441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402541696 + ... + 402544975.

It is an arithmetic number, because the mean of its divisors is an integer number (95100863130).

Almost surely, 2^{1320342140440} is an apocalyptic number.

1320342140440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320342140440 is an abundant number, since it is smaller than the sum of its proper divisors (1722885479720).

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

1320342140440 is a wasteful number, since it uses less digits than its factorization.

1320342140440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805086723 (or 805086719 counting only the distinct ones).

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

Adding to 1320342140440 its reverse (440412430231), we get a palindrome (1760754570671).

The spelling of 1320342140440 in words is "one trillion, three hundred twenty billion, three hundred forty-two million, one hundred forty thousand, four hundred forty".