1328636766 has 8 divisors (see below), whose sum is σ = 2657273544. Its totient is φ = 442878920.

The previous prime is 1328636723. The next prime is 1328636779. The reversal of 1328636766 is 6676368231.

It is a happy number.

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

1328636766 is an admirable number.

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, 110719725 + ... + 110719736.

It is an arithmetic number, because the mean of its divisors is an integer number (332159193).

Almost surely, 2^1328636766 is an apocalyptic number.

1328636766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1328636766 is a wasteful number, since it uses less digits than its factorization.

1328636766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221439466.

The product of its digits is 1306368, while the sum is 48.

The square root of 1328636766 is about 36450.4700381216. The cubic root of 1328636766 is about 1099.3485856618.

The spelling of 1328636766 in words is "one billion, three hundred twenty-eight million, six hundred thirty-six thousand, seven hundred sixty-six".