1328187485 has 4 divisors (see below), whose sum is σ = 1593824988. Its totient is φ = 1062549984.

The previous prime is 1328187461. The next prime is 1328187493. The reversal of 1328187485 is 5847818231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 723125881 + 605061604 = 26891^2 + 24598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328187485 - 2²⁰ = 1327138909 is a prime.

It is a super-3 number, since 3×1328187485³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132818744 + ... + 132818753.

It is an arithmetic number, because the mean of its divisors is an integer number (398456247).

Almost surely, 2^1328187485 is an apocalyptic number.

It is an amenable number.

1328187485 is a deficient number, since it is larger than the sum of its proper divisors (265637503).

1328187485 is an equidigital number, since it uses as much as digits as its factorization.

1328187485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265637502.

The product of its digits is 430080, while the sum is 47.

The square root of 1328187485 is about 36444.3066198275. The cubic root of 1328187485 is about 1099.2246561003.

The spelling of 1328187485 in words is "one billion, three hundred twenty-eight million, one hundred eighty-seven thousand, four hundred eighty-five".