6438003 has 32 divisors (see below), whose sum is σ = 10348800. Its totient is φ = 3507840.

The previous prime is 6437983. The next prime is 6438007. The reversal of 6438003 is 3008346.

It is not a de Polignac number, because 6438003 - 2¹⁷ = 6306931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6438007) 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, 18273 + ... + 18621.

It is an arithmetic number, because the mean of its divisors is an integer number (323400).

Almost surely, 2^6438003 is an apocalyptic number.

6438003 is a deficient number, since it is larger than the sum of its proper divisors (3910797).

6438003 is a wasteful number, since it uses less digits than its factorization.

6438003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 6438003 is about 2537.3220134622. The cubic root of 6438003 is about 186.0303164828.

It can be divided in two parts, 643 and 8003, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 6438003 in words is "six million, four hundred thirty-eight thousand, three".