1328209888 has 96 divisors (see below), whose sum is σ = 2819577600. Its totient is φ = 614439936.

The previous prime is 1328209871. The next prime is 1328209933. The reversal of 1328209888 is 8889028231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3169743 + ... + 3170161.

It is an arithmetic number, because the mean of its divisors is an integer number (29370600).

Almost surely, 2^1328209888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1328209888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1409788800).

1328209888 is an abundant number, since it is smaller than the sum of its proper divisors (1491367712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1328209888 is a wasteful number, since it uses less digits than its factorization.

1328209888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 1328209888 is about 36444.6139779255. The cubic root of 1328209888 is about 1099.2308364004.

The spelling of 1328209888 in words is "one billion, three hundred twenty-eight million, two hundred nine thousand, eight hundred eighty-eight".