1328591996 has 12 divisors (see below), whose sum is σ = 2325786960. Its totient is φ = 664081440.

The previous prime is 1328591959. The next prime is 1328592011. The reversal of 1328591996 is 6991958231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39281 + ... + 64808.

It is an arithmetic number, because the mean of its divisors is an integer number (193815580).

Almost surely, 2^1328591996 is an apocalyptic number.

It is an amenable number.

1328591996 is a deficient number, since it is larger than the sum of its proper divisors (997194964).

1328591996 is a wasteful number, since it uses less digits than its factorization.

1328591996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107284 (or 107282 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 53.

The square root of 1328591996 is about 36449.8559119237. The cubic root of 1328591996 is about 1099.3362375693.

The spelling of 1328591996 in words is "one billion, three hundred twenty-eight million, five hundred ninety-one thousand, nine hundred ninety-six".