638342 has 8 divisors (see below), whose sum is σ = 999216. Its totient is φ = 305272.

The previous prime is 638327. The next prime is 638347. The reversal of 638342 is 243836.

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

It is a d-powerful number, because it can be written as 6⁷ + 3¹¹ + 3¹¹ + 8 + 4⁶ + 2³ .

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638347) by changing a digit.

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, 6893 + ... + 6984.

It is an arithmetic number, because the mean of its divisors is an integer number (124902).

2⁶³⁸³⁴² is an apocalyptic number.

638342 is a deficient number, since it is larger than the sum of its proper divisors (360874).

638342 is a wasteful number, since it uses less digits than its factorization.

638342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13902.

The product of its digits is 3456, while the sum is 26.

The square root of 638342 is about 798.9630779955. The cubic root of 638342 is about 86.1029054809.

It can be divided in two parts, 63834 and 2, that added together give a palindrome (63836).

The spelling of 638342 in words is "six hundred thirty-eight thousand, three hundred forty-two".