1328838885 has 64 divisors (see below), whose sum is σ = 2601538560. Its totient is φ = 638187840.

The previous prime is 1328838871. The next prime is 1328838893. The reversal of 1328838885 is 5888388231.

It is a happy number.

It is not a de Polignac number, because 1328838885 - 2⁶ = 1328838821 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 154714 + ... + 163076.

It is an arithmetic number, because the mean of its divisors is an integer number (40649040).

Almost surely, 2^1328838885 is an apocalyptic number.

1328838885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328838885 is a deficient number, since it is larger than the sum of its proper divisors (1272699675).

1328838885 is a wasteful number, since it uses less digits than its factorization.

1328838885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8495 (or 8489 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 54.

The square root of 1328838885 is about 36453.2424483749. The cubic root of 1328838885 is about 1099.4043290062.

The spelling of 1328838885 in words is "one billion, three hundred twenty-eight million, eight hundred thirty-eight thousand, eight hundred eighty-five".