1663328 has 24 divisors (see below), whose sum is σ = 3333960. Its totient is φ = 816640.

The previous prime is 1663327. The next prime is 1663349. The reversal of 1663328 is 8233661.

It is a zygodrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1663328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663327) 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, 1448 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2^1663328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666980).

1663328 is an abundant number, since it is smaller than the sum of its proper divisors (1670632).

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

1663328 is an equidigital number, since it uses as much as digits as its factorization.

1663328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 942 counting only the distinct ones).

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

The square root of 1663328 is about 1289.7007404821. The cubic root of 1663328 is about 118.4838886865.

Adding to 1663328 its reverse (8233661), we get a palindrome (9896989).

It can be divided in two parts, 16633 and 28, that added together give a palindrome (16661).

The spelling of 1663328 in words is "one million, six hundred sixty-three thousand, three hundred twenty-eight".