1320444132880 has 40 divisors (see below), whose sum is σ = 3070740960000. Its totient is φ = 528055786368.

The previous prime is 1320444132857. The next prime is 1320444132881. The reversal of 1320444132880 is 882314440231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1320444132881) by changing a digit.

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, 1554880 + ... + 2249119.

It is an arithmetic number, because the mean of its divisors is an integer number (76768524000).

Almost surely, 2^{1320444132880} is an apocalyptic number.

1320444132880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320444132880 is an abundant number, since it is smaller than the sum of its proper divisors (1750296827120).

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

1320444132880 is a wasteful number, since it uses less digits than its factorization.

1320444132880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808351 (or 3808345 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 1320444132880 in words is "one trillion, three hundred twenty billion, four hundred forty-four million, one hundred thirty-two thousand, eight hundred eighty".