1329928 has 16 divisors (see below), whose sum is σ = 2561580. Its totient is φ = 646848.

The previous prime is 1329907. The next prime is 1329941. The reversal of 1329928 is 8299231.

It can be written as a sum of positive squares in 2 ways, for example, as 917764 + 412164 = 958^2 + 642^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1329893 and 1329902.

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, 1951 + ... + 2542.

2^1329928 is an apocalyptic number.

It is an amenable number.

1329928 is a deficient number, since it is larger than the sum of its proper divisors (1231652).

1329928 is a wasteful number, since it uses less digits than its factorization.

1329928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536 (or 4532 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 1329928 is about 1153.2250430857. The cubic root of 1329928 is about 109.9704603876.

The spelling of 1329928 in words is "one million, three hundred twenty-nine thousand, nine hundred twenty-eight".