638576 has 20 divisors (see below), whose sum is σ = 1252152. Its totient is φ = 315456.

The previous prime is 638567. The next prime is 638581. The reversal of 638576 is 675836.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

638576 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526 + ... + 1898.

2⁶³⁸⁵⁷⁶ is an apocalyptic number.

It is an amenable number.

638576 is a deficient number, since it is larger than the sum of its proper divisors (613576).

638576 is a wasteful number, since it uses less digits than its factorization.

638576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 638576 is about 799.1095043860. The cubic root of 638576 is about 86.1134252432.

The spelling of 638576 in words is "six hundred thirty-eight thousand, five hundred seventy-six".