1328605406 has 8 divisors (see below), whose sum is σ = 2008121544. Its totient is φ = 659231560.

The previous prime is 1328605387. The next prime is 1328605429. The reversal of 1328605406 is 6045068231.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2535245 + ... + 2535768.

It is an arithmetic number, because the mean of its divisors is an integer number (251015193).

Almost surely, 2^1328605406 is an apocalyptic number.

1328605406 is a deficient number, since it is larger than the sum of its proper divisors (679516138).

1328605406 is a wasteful number, since it uses less digits than its factorization.

1328605406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071146.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1328605406 is about 36450.0398628040. The cubic root of 1328605406 is about 1099.3399362341.

The spelling of 1328605406 in words is "one billion, three hundred twenty-eight million, six hundred five thousand, four hundred six".