1320440441 has 8 divisors (see below), whose sum is σ = 1370912520. Its totient is φ = 1270297728.

The previous prime is 1320440437. The next prime is 1320440447. The reversal of 1320440441 is 1440440231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 84566416 + 1235874025 = 9196^2 + 35155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320440441 - 2² = 1320440437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320440447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74156 + ... + 90221.

It is an arithmetic number, because the mean of its divisors is an integer number (171364065).

Almost surely, 2^1320440441 is an apocalyptic number.

It is an amenable number.

1320440441 is a deficient number, since it is larger than the sum of its proper divisors (50472079).

1320440441 is a wasteful number, since it uses less digits than its factorization.

1320440441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164683.

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

The square root of 1320440441 is about 36337.8651134048. The cubic root of 1320440441 is about 1097.0833036708.

Adding to 1320440441 its reverse (1440440231), we get a palindrome (2760880672).

The spelling of 1320440441 in words is "one billion, three hundred twenty million, four hundred forty thousand, four hundred forty-one".