638043 has 16 divisors (see below), whose sum is σ = 1015296. Its totient is φ = 348480.

The previous prime is 638023. The next prime is 638047. The reversal of 638043 is 340836.

It is not a de Polignac number, because 638043 - 2⁸ = 637787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638047) 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, 178 + ... + 1143.

It is an arithmetic number, because the mean of its divisors is an integer number (63456).

2⁶³⁸⁰⁴³ is an apocalyptic number.

638043 is a deficient number, since it is larger than the sum of its proper divisors (377253).

638043 is a wasteful number, since it uses less digits than its factorization.

638043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354.

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

The square root of 638043 is about 798.7759385460. The cubic root of 638043 is about 86.0894598204.

Adding to 638043 its reverse (340836), we get a palindrome (978879).

The spelling of 638043 in words is "six hundred thirty-eight thousand, forty-three".