2003646 has 8 divisors (see below), whose sum is σ = 4007304. Its totient is φ = 667880.

The previous prime is 2003641. The next prime is 2003647. The reversal of 2003646 is 6463002.

It is a sphenic number, since it is the product of 3 distinct primes.

2003646 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166965 + ... + 166976.

It is an arithmetic number, because the mean of its divisors is an integer number (500913).

2^2003646 is an apocalyptic number.

2003646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2003646 is a wasteful number, since it uses less digits than its factorization.

2003646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333946.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2003646 is about 1415.5020310830. The cubic root of 2003646 is about 126.0686197153.

Adding to 2003646 its reverse (6463002), we get a palindrome (8466648).

The spelling of 2003646 in words is "two million, three thousand, six hundred forty-six".