1329019668 has 36 divisors (see below), whose sum is σ = 3389206548. Its totient is φ = 439084800.

The previous prime is 1329019577. The next prime is 1329019691. The reversal of 1329019668 is 8669109231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 246741264 + 1082278404 = 15708^2 + 32898^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 159283 + ... + 167418.

Almost surely, 2^1329019668 is an apocalyptic number.

1329019668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1329019668 is an abundant number, since it is smaller than the sum of its proper divisors (2060186880).

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

1329019668 is a wasteful number, since it uses less digits than its factorization.

1329019668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326824 (or 326819 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1329019668 is about 36455.7220200067. The cubic root of 1329019668 is about 1099.4541832066.

The spelling of 1329019668 in words is "one billion, three hundred twenty-nine million, nineteen thousand, six hundred sixty-eight".