1328635320 has 32 divisors (see below), whose sum is σ = 3985906320. Its totient is φ = 354302720.

The previous prime is 1328635309. The next prime is 1328635333. The reversal of 1328635320 is 235368231.

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 7 ways as a sum of consecutive naturals, for example, 5535861 + ... + 5536100.

Almost surely, 2^1328635320 is an apocalyptic number.

1328635320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328635320 is an abundant number, since it is smaller than the sum of its proper divisors (2657271000).

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

1328635320 is a wasteful number, since it uses less digits than its factorization.

1328635320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071975 (or 11071971 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1328635320 is about 36450.4502029810. The cubic root of 1328635320 is about 1099.3481868423.

The spelling of 1328635320 in words is "one billion, three hundred twenty-eight million, six hundred thirty-five thousand, three hundred twenty".