1328881005 has 64 divisors (see below), whose sum is σ = 2483712000. Its totient is φ = 672826176.

The previous prime is 1328881003. The next prime is 1328881009. The reversal of 1328881005 is 5001888231.

It is not a de Polignac number, because 1328881005 - 2¹ = 1328881003 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328881003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 430056 + ... + 433134.

It is an arithmetic number, because the mean of its divisors is an integer number (38808000).

Almost surely, 2^1328881005 is an apocalyptic number.

1328881005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328881005 is a deficient number, since it is larger than the sum of its proper divisors (1154830995).

1328881005 is a wasteful number, since it uses less digits than its factorization.

1328881005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255 (or 3249 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 1328881005 is about 36453.8201701824. The cubic root of 1328881005 is about 1099.4159447663.

The spelling of 1328881005 in words is "one billion, three hundred twenty-eight million, eight hundred eighty-one thousand, five".