1328223209 has 8 divisors (see below), whose sum is σ = 1427345568. Its totient is φ = 1231433280.

The previous prime is 1328223181. The next prime is 1328223217. The reversal of 1328223209 is 9023228231.

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 1328223209 - 2⁸ = 1328222953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1328223109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581927 + ... + 584204.

It is an arithmetic number, because the mean of its divisors is an integer number (178418196).

Almost surely, 2^1328223209 is an apocalyptic number.

It is an amenable number.

1328223209 is a deficient number, since it is larger than the sum of its proper divisors (99122359).

1328223209 is a wasteful number, since it uses less digits than its factorization.

1328223209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166215.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1328223209 is about 36444.7967342390. The cubic root of 1328223209 is about 1099.2345112224.

The spelling of 1328223209 in words is "one billion, three hundred twenty-eight million, two hundred twenty-three thousand, two hundred nine".