1328663 has 8 divisors (see below), whose sum is σ = 1525632. Its totient is φ = 1133496.

The previous prime is 1328653. The next prime is 1328671. The reversal of 1328663 is 3668231.

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

It is not a de Polignac number, because 1328663 - 2⁴ = 1328647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156 + ... + 2702.

It is an arithmetic number, because the mean of its divisors is an integer number (190704).

2^1328663 is an apocalyptic number.

1328663 is a deficient number, since it is larger than the sum of its proper divisors (196969).

1328663 is an equidigital number, since it uses as much as digits as its factorization.

1328663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901.

The product of its digits is 5184, while the sum is 29.

The square root of 1328663 is about 1152.6764507007. The cubic root of 1328663 is about 109.9355821179.

It can be divided in two parts, 1328 and 663, that added together give a palindrome (1991).

The spelling of 1328663 in words is "one million, three hundred twenty-eight thousand, six hundred sixty-three".