1328805915 has 16 divisors (see below), whose sum is σ = 2127752448. Its totient is φ = 708142176.

The previous prime is 1328805913. The next prime is 1328805937. The reversal of 1328805915 is 5195088231.

It is not a de Polignac number, because 1328805915 - 2¹ = 1328805913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1328805913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14449 + ... + 53538.

It is an arithmetic number, because the mean of its divisors is an integer number (132984528).

Almost surely, 2^1328805915 is an apocalyptic number.

1328805915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1328805915 is a deficient number, since it is larger than the sum of its proper divisors (798946533).

1328805915 is a wasteful number, since it uses less digits than its factorization.

1328805915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69298.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 1328805915 is about 36452.7902224233. The cubic root of 1328805915 is about 1099.3952364415.

The spelling of 1328805915 in words is "one billion, three hundred twenty-eight million, eight hundred five thousand, nine hundred fifteen".