2003638 has 32 divisors (see below), whose sum is σ = 3769920. Its totient is φ = 777600.

The previous prime is 2003633. The next prime is 2003641. The reversal of 2003638 is 8363002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18328 + ... + 18436.

It is an arithmetic number, because the mean of its divisors is an integer number (117810).

2^2003638 is an apocalyptic number.

2003638 is a deficient number, since it is larger than the sum of its proper divisors (1766282).

2003638 is a wasteful number, since it uses less digits than its factorization.

2003638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2003638 is about 1415.4992052276. The cubic root of 2003638 is about 126.0684519295.

The spelling of 2003638 in words is "two million, three thousand, six hundred thirty-eight".