1320354440 has 16 divisors (see below), whose sum is σ = 2970797580. Its totient is φ = 528141760.

The previous prime is 1320354437. The next prime is 1320354443. The reversal of 1320354440 is 444530231.

It is an interprime number because it is at equal distance from previous prime (1320354437) and next prime (1320354443).

It can be written as a sum of positive squares in 2 ways, for example, as 1089132004 + 231222436 = 33002^2 + 15206^2 .

It is not an unprimeable number, because it can be changed into a prime (1320354443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16504391 + ... + 16504470.

Almost surely, 2^1320354440 is an apocalyptic number.

1320354440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320354440 is an abundant number, since it is smaller than the sum of its proper divisors (1650443140).

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

1320354440 is a wasteful number, since it uses less digits than its factorization.

1320354440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33008872 (or 33008868 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 1320354440 is about 36336.6817417331. The cubic root of 1320354440 is about 1097.0594852774.

Adding to 1320354440 its reverse (444530231), we get a palindrome (1764884671).

The spelling of 1320354440 in words is "one billion, three hundred twenty million, three hundred fifty-four thousand, four hundred forty".