1328402806 has 8 divisors (see below), whose sum is σ = 1999798560. Its totient is φ = 661803288.

The previous prime is 1328402773. The next prime is 1328402807. The reversal of 1328402806 is 6082048231.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328402807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198366 + ... + 1199473.

It is an arithmetic number, because the mean of its divisors is an integer number (249974820).

Almost surely, 2^1328402806 is an apocalyptic number.

1328402806 is a deficient number, since it is larger than the sum of its proper divisors (671395754).

1328402806 is a wasteful number, since it uses less digits than its factorization.

1328402806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398118.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 1328402806 is about 36447.2606103669. The cubic root of 1328402806 is about 1099.2840536793.

The spelling of 1328402806 in words is "one billion, three hundred twenty-eight million, four hundred two thousand, eight hundred six".