1329399472 has 10 divisors (see below), whose sum is σ = 2575711508. Its totient is φ = 664699728.

The previous prime is 1329399437. The next prime is 1329399509. The reversal of 1329399472 is 2749939231.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41543718 + ... + 41543749.

Almost surely, 2^1329399472 is an apocalyptic number.

It is an amenable number.

1329399472 is a deficient number, since it is larger than the sum of its proper divisors (1246312036).

1329399472 is an equidigital number, since it uses as much as digits as its factorization.

1329399472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83087475 (or 83087469 counting only the distinct ones).

The product of its digits is 734832, while the sum is 49.

The square root of 1329399472 is about 36460.9307615700. The cubic root of 1329399472 is about 1099.5589063432.

The spelling of 1329399472 in words is "one billion, three hundred twenty-nine million, three hundred ninety-nine thousand, four hundred seventy-two".