638259 has 8 divisors (see below), whose sum is σ = 878592. Its totient is φ = 411720.

The previous prime is 638233. The next prime is 638263. The reversal of 638259 is 952836.

It is a happy number.

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

It is not a de Polignac number, because 638259 - 2¹¹ = 636211 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 3¹² + 2¹⁰ + 8² + 5² + 9⁵ .

It is not an unprimeable number, because it can be changed into a prime (638269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3339 + ... + 3524.

It is an arithmetic number, because the mean of its divisors is an integer number (109824).

2⁶³⁸²⁵⁹ is an apocalyptic number.

638259 is a deficient number, since it is larger than the sum of its proper divisors (240333).

638259 is a wasteful number, since it uses less digits than its factorization.

638259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6897.

The product of its digits is 12960, while the sum is 33.

The square root of 638259 is about 798.9111339817. The cubic root of 638259 is about 86.0991734945.

It can be divided in two parts, 6382 and 59, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 638259 in words is "six hundred thirty-eight thousand, two hundred fifty-nine".