1329808 has 20 divisors (see below), whose sum is σ = 2728620. Its totient is φ = 625664.

The previous prime is 1329799. The next prime is 1329847. The reversal of 1329808 is 8089231.

It can be written as a sum of positive squares in 2 ways, for example, as 984064 + 345744 = 992^2 + 588^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1329808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173 + ... + 2716.

It is an arithmetic number, because the mean of its divisors is an integer number (136431).

2^1329808 is an apocalyptic number.

It is an amenable number.

1329808 is an abundant number, since it is smaller than the sum of its proper divisors (1398812).

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

1329808 is a wasteful number, since it uses less digits than its factorization.

1329808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4914 (or 4908 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1329808 is about 1153.1730139055. The cubic root of 1329808 is about 109.9671527268.

The spelling of 1329808 in words is "one million, three hundred twenty-nine thousand, eight hundred eight".