1001984 has 40 divisors (see below), whose sum is σ = 2127840. Its totient is φ = 470016.

The previous prime is 1001983. The next prime is 1001989. The reversal of 1001984 is 4891001.

It is not an unprimeable number, because it can be changed into a prime (1001981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9677 + ... + 9779.

It is an arithmetic number, because the mean of its divisors is an integer number (53196).

2^1001984 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 1001984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1063920).

1001984 is an abundant number, since it is smaller than the sum of its proper divisors (1125856).

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

1001984 is an equidigital number, since it uses as much as digits as its factorization.

1001984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1001984 is about 1000.9915084555. The cubic root of 1001984 is about 100.0660896453.

Adding to 1001984 its reverse (4891001), we get a palindrome (5892985).

The spelling of 1001984 in words is "one million, one thousand, nine hundred eighty-four".