1001328 has 40 divisors (see below), whose sum is σ = 2702208. Its totient is φ = 318912.

The previous prime is 1001327. The next prime is 1001347. The reversal of 1001328 is 8231001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651 + ... + 1557.

2^1001328 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 1001328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351104).

1001328 is an abundant number, since it is smaller than the sum of its proper divisors (1700880).

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

1001328 is a wasteful number, since it uses less digits than its factorization.

1001328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1001328 is about 1000.6637796983. The cubic root of 1001328 is about 100.0442470857.

Adding to 1001328 its reverse (8231001), we get a palindrome (9232329).

The spelling of 1001328 in words is "one million, one thousand, three hundred twenty-eight".