1320441440 has 24 divisors (see below), whose sum is σ = 3119543280. Its totient is φ = 528176512.

The previous prime is 1320441433. The next prime is 1320441443. The reversal of 1320441440 is 441440231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320441443) 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, 4126220 + ... + 4126539.

It is an arithmetic number, because the mean of its divisors is an integer number (129980970).

Almost surely, 2^1320441440 is an apocalyptic number.

1320441440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320441440 is an abundant number, since it is smaller than the sum of its proper divisors (1799101840).

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

1320441440 is an equidigital number, since it uses as much as digits as its factorization.

1320441440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252774 (or 8252766 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1320441440 is about 36337.8788593941. The cubic root of 1320441440 is about 1097.0835803426.

Adding to 1320441440 its reverse (441440231), we get a palindrome (1761881671).

The spelling of 1320441440 in words is "one billion, three hundred twenty million, four hundred forty-one thousand, four hundred forty".