1328905215 has 96 divisors (see below), whose sum is σ = 2695680000. Its totient is φ = 598440960.

The previous prime is 1328905187. The next prime is 1328905217. The reversal of 1328905215 is 5125098231.

It is not a de Polignac number, because 1328905215 - 2⁵ = 1328905183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1328905215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328905217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 663786 + ... + 665784.

It is an arithmetic number, because the mean of its divisors is an integer number (28080000).

Almost surely, 2^1328905215 is an apocalyptic number.

1328905215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1328905215 is an abundant number, since it is smaller than the sum of its proper divisors (1366774785).

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

1328905215 is a wasteful number, since it uses less digits than its factorization.

1328905215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1328905215 is about 36454.1522326333. The cubic root of 1328905215 is about 1099.4226212352.

The spelling of 1328905215 in words is "one billion, three hundred twenty-eight million, nine hundred five thousand, two hundred fifteen".