1328860865 has 8 divisors (see below), whose sum is σ = 1595134248. Its totient is φ = 1062754560.

The previous prime is 1328860847. The next prime is 1328860867. The reversal of 1328860865 is 5680688231.

It can be written as a sum of positive squares in 4 ways, for example, as 385572496 + 943288369 = 19636^2 + 30713^2 .

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

It is not a de Polignac number, because 1328860865 - 2¹⁰ = 1328859841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328860867) 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, 23546 + ... + 56675.

It is an arithmetic number, because the mean of its divisors is an integer number (199391781).

Almost surely, 2^1328860865 is an apocalyptic number.

It is an amenable number.

1328860865 is a deficient number, since it is larger than the sum of its proper divisors (266273383).

1328860865 is an equidigital number, since it uses as much as digits as its factorization.

1328860865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83539.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 1328860865 is about 36453.5439292259. The cubic root of 1328860865 is about 1099.4103906324.

The spelling of 1328860865 in words is "one billion, three hundred twenty-eight million, eight hundred sixty thousand, eight hundred sixty-five".