2001996 has 60 divisors (see below), whose sum is σ = 5407248. Its totient is φ = 645408.

The previous prime is 2001977. The next prime is 2001997. The reversal of 2001996 is 6991002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2001997) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11905 + ... + 12071.

2^2001996 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 2001996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2703624).

2001996 is an abundant number, since it is smaller than the sum of its proper divisors (3405252).

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

2001996 is a wasteful number, since it uses less digits than its factorization.

2001996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 2001996 is about 1414.9190789582. The cubic root of 2001996 is about 126.0340044276.

Adding to 2001996 its reverse (6991002), we get a palindrome (8992998).

The spelling of 2001996 in words is "two million, one thousand, nine hundred ninety-six".