1328788668 has 24 divisors (see below), whose sum is σ = 3107679568. Its totient is φ = 441904896.

The previous prime is 1328788649. The next prime is 1328788679. The reversal of 1328788668 is 8668878231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122671 + ... + 133062.

Almost surely, 2^1328788668 is an apocalyptic number.

It is an amenable number.

1328788668 is an abundant number, since it is smaller than the sum of its proper divisors (1778890900).

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

1328788668 is a wasteful number, since it uses less digits than its factorization.

1328788668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256173 (or 256171 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The square root of 1328788668 is about 36452.5536554025. The cubic root of 1328788668 is about 1099.3904799526.

The spelling of 1328788668 in words is "one billion, three hundred twenty-eight million, seven hundred eighty-eight thousand, six hundred sixty-eight".