1329471988 has 12 divisors (see below), whose sum is σ = 2505543460. Its totient is φ = 613602432.

The previous prime is 1329471959. The next prime is 1329472021. The reversal of 1329471988 is 8891749231.

It can be written as a sum of positive squares in 2 ways, for example, as 524501604 + 804970384 = 22902^2 + 28372^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 25566769 = 1329471988 / (1 + 3 + 2 + 9 + 4 + 7 + 1 + 9 + 8 + 8).

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 3 ways as a sum of consecutive naturals, for example, 12783333 + ... + 12783436.

Almost surely, 2^1329471988 is an apocalyptic number.

It is an amenable number.

1329471988 is a deficient number, since it is larger than the sum of its proper divisors (1176071472).

1329471988 is a wasteful number, since it uses less digits than its factorization.

1329471988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25566786 (or 25566784 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 1329471988 is about 36461.9251823049. The cubic root of 1329471988 is about 1099.5788988701.

The spelling of 1329471988 in words is "one billion, three hundred twenty-nine million, four hundred seventy-one thousand, nine hundred eighty-eight".