2003994 has 64 divisors (see below), whose sum is σ = 4924800. Its totient is φ = 601344.

The previous prime is 2003971. The next prime is 2003999. The reversal of 2003994 is 4993002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33937 + ... + 33995.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2^2003994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2003994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2462400).

2003994 is an abundant number, since it is smaller than the sum of its proper divisors (2920806).

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

2003994 is a wasteful number, since it uses less digits than its factorization.

2003994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2003994 is about 1415.6249503311. The cubic root of 2003994 is about 126.0759179673.

Adding to 2003994 its reverse (4993002), we get a palindrome (6996996).

The spelling of 2003994 in words is "two million, three thousand, nine hundred ninety-four".