638295 has 16 divisors (see below), whose sum is σ = 1167360. Its totient is φ = 291744.

The previous prime is 638269. The next prime is 638303. The reversal of 638295 is 592836.

638295 = 68² + 69² + ... + 130².

It is a happy number.

It is not a de Polignac number, because 638295 - 2⁵ = 638263 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 3¹² + 2⁹ + 8³ + 9⁵ + 5³ .

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2935 + ... + 3144.

It is an arithmetic number, because the mean of its divisors is an integer number (72960).

2⁶³⁸²⁹⁵ is an apocalyptic number.

638295 is a deficient number, since it is larger than the sum of its proper divisors (529065).

638295 is a wasteful number, since it uses less digits than its factorization.

638295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094.

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

The square root of 638295 is about 798.9336643301. The cubic root of 638295 is about 86.1007922271.

The spelling of 638295 in words is "six hundred thirty-eight thousand, two hundred ninety-five".