1320004334440 has 128 divisors (see below), whose sum is σ = 3299946894720. Its totient is φ = 471195878400.

The previous prime is 1320004334437. The next prime is 1320004334501. The reversal of 1320004334440 is 444334000231.

It is a super-2 number, since 2×1320004334440² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1320004334399 and 1320004334408.

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, 5618530 + ... + 5848750.

It is an arithmetic number, because the mean of its divisors is an integer number (25780835115).

Almost surely, 2^{1320004334440} is an apocalyptic number.

1320004334440 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 1320004334440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649973447360).

1320004334440 is an abundant number, since it is smaller than the sum of its proper divisors (1979942560280).

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

1320004334440 is a wasteful number, since it uses less digits than its factorization.

1320004334440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230483 (or 230479 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 1320004334440 its reverse (444334000231), we get a palindrome (1764338334671).

The spelling of 1320004334440 in words is "one trillion, three hundred twenty billion, four million, three hundred thirty-four thousand, four hundred forty".