638325 has 18 divisors (see below), whose sum is σ = 1143714. Its totient is φ = 340320.

The previous prime is 638317. The next prime is 638327. The reversal of 638325 is 523836.

638325 is a `hidden beast` number, since 638 + 3 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1521 + 636804 = 39^2 + 798^2 .

It is not a de Polignac number, because 638325 - 2³ = 638317 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638327) 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 17 ways as a sum of consecutive naturals, for example, 1194 + ... + 1643.

2⁶³⁸³²⁵ is an apocalyptic number.

It is an amenable number.

638325 is a deficient number, since it is larger than the sum of its proper divisors (505389).

638325 is a wasteful number, since it uses less digits than its factorization.

638325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853 (or 2845 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 638325 is about 798.9524391351. The cubic root of 638325 is about 86.1021411245.

The spelling of 638325 in words is "six hundred thirty-eight thousand, three hundred twenty-five".