1328509312 has 32 divisors (see below), whose sum is σ = 2850230880. Its totient is φ = 613157376.

The previous prime is 1328509307. The next prime is 1328509321. The reversal of 1328509312 is 2139058231.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397528 + ... + 400855.

It is an arithmetic number, because the mean of its divisors is an integer number (89069715).

Almost surely, 2^1328509312 is an apocalyptic number.

It is an amenable number.

1328509312 is an abundant number, since it is smaller than the sum of its proper divisors (1521721568).

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

1328509312 is an equidigital number, since it uses as much as digits as its factorization.

1328509312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798410 (or 798398 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1328509312 is about 36448.7216785445. The cubic root of 1328509312 is about 1099.3134316205.

The spelling of 1328509312 in words is "one billion, three hundred twenty-eight million, five hundred nine thousand, three hundred twelve".