1329947885 has 8 divisors (see below), whose sum is σ = 1823928576. Its totient is φ = 911964240.

The previous prime is 1329947867. The next prime is 1329947887. The reversal of 1329947885 is 5887499231.

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

It is not a de Polignac number, because 1329947885 - 2⁸ = 1329947629 is a prime.

It is a super-2 number, since 2×1329947885² = 3537522753631946450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1329947885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329947887) 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, 18999221 + ... + 18999290.

It is an arithmetic number, because the mean of its divisors is an integer number (227991072).

Almost surely, 2^1329947885 is an apocalyptic number.

It is an amenable number.

1329947885 is a deficient number, since it is larger than the sum of its proper divisors (493980691).

1329947885 is an equidigital number, since it uses as much as digits as its factorization.

1329947885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37998523.

The product of its digits is 4354560, while the sum is 56.

The square root of 1329947885 is about 36468.4505429008. The cubic root of 1329947885 is about 1099.7100847539.

The spelling of 1329947885 in words is "one billion, three hundred twenty-nine million, nine hundred forty-seven thousand, eight hundred eighty-five".