638267 has 8 divisors (see below), whose sum is σ = 768000. Its totient is φ = 518184.

The previous prime is 638263. The next prime is 638269. The reversal of 638267 is 762836.

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

It is a cyclic number.

It is not a de Polignac number, because 638267 - 2² = 638263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638263) 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 7 ways as a sum of consecutive naturals, for example, 2267 + ... + 2532.

It is an arithmetic number, because the mean of its divisors is an integer number (96000).

2⁶³⁸²⁶⁷ is an apocalyptic number.

638267 is a deficient number, since it is larger than the sum of its proper divisors (129733).

638267 is a wasteful number, since it uses less digits than its factorization.

638267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825.

The product of its digits is 12096, while the sum is 32.

The square root of 638267 is about 798.9161407807. The cubic root of 638267 is about 86.0995332181.

The spelling of 638267 in words is "six hundred thirty-eight thousand, two hundred sixty-seven".