1340404402320 has 60 divisors (see below), whose sum is σ = 4501524786876. Its totient is φ = 357441173760.

The previous prime is 1340404402301. The next prime is 1340404402327. The reversal of 1340404402320 is 232044040431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 477110695824 + 863293706496 = 690732^2 + 929136^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (1340404402327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 930835671 + ... + 930837110.

Almost surely, 2^{1340404402320} is an apocalyptic number.

1340404402320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340404402320 is an abundant number, since it is smaller than the sum of its proper divisors (3161120384556).

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

1340404402320 is a wasteful number, since it uses less digits than its factorization.

1340404402320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861672800 (or 1861672791 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 1340404402320 its reverse (232044040431), we get a palindrome (1572448442751).

The spelling of 1340404402320 in words is "one trillion, three hundred forty billion, four hundred four million, four hundred two thousand, three hundred twenty".