1328135445 has 96 divisors (see below), whose sum is σ = 2891616000. Its totient is φ = 560359296.

The previous prime is 1328135441. The next prime is 1328135477. The reversal of 1328135445 is 5445318231.

1328135445 is a `hidden beast` number, since 1 + 32 + 81 + 3 + 544 + 5 = 666.

It is not a de Polignac number, because 1328135445 - 2² = 1328135441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328135441) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 197346 + ... + 203964.

It is an arithmetic number, because the mean of its divisors is an integer number (30121000).

Almost surely, 2^1328135445 is an apocalyptic number.

1328135445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328135445 is an abundant number, since it is smaller than the sum of its proper divisors (1563480555).

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

1328135445 is a wasteful number, since it uses less digits than its factorization.

1328135445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664 (or 6647 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1328135445 is about 36443.5926467191. The cubic root of 1328135445 is about 1099.2102995935.

The spelling of 1328135445 in words is "one billion, three hundred twenty-eight million, one hundred thirty-five thousand, four hundred forty-five".