1329388845 has 16 divisors (see below), whose sum is σ = 2219501952. Its totient is φ = 678180800.

The previous prime is 1329388829. The next prime is 1329388849. The reversal of 1329388845 is 5488839231.

It is not a de Polignac number, because 1329388845 - 2⁴ = 1329388829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329388849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1926306 + ... + 1926995.

It is an arithmetic number, because the mean of its divisors is an integer number (138718872).

Almost surely, 2^1329388845 is an apocalyptic number.

1329388845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1329388845 is a deficient number, since it is larger than the sum of its proper divisors (890113107).

1329388845 is a wasteful number, since it uses less digits than its factorization.

1329388845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853332.

The product of its digits is 1658880, while the sum is 51.

The square root of 1329388845 is about 36460.7850299469. The cubic root of 1329388845 is about 1099.5559764379. Note that the first 3 decimals are identical.

The spelling of 1329388845 in words is "one billion, three hundred twenty-nine million, three hundred eighty-eight thousand, eight hundred forty-five".