162638 has 8 divisors (see below), whose sum is σ = 278832. Its totient is φ = 69696.

The previous prime is 162629. The next prime is 162641. The reversal of 162638 is 836261.

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

It is a super-2 number, since 2×162638² = 52902238088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

162638 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 5795 + ... + 5822.

It is an arithmetic number, because the mean of its divisors is an integer number (34854).

2¹⁶²⁶³⁸ is an apocalyptic number.

162638 is a deficient number, since it is larger than the sum of its proper divisors (116194).

162638 is a wasteful number, since it uses less digits than its factorization.

162638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11626.

The product of its digits is 1728, while the sum is 26.

The square root of 162638 is about 403.2840190238. The cubic root of 162638 is about 54.5850871893.

Adding to 162638 its reverse (836261), we get a palindrome (998899).

The spelling of 162638 in words is "one hundred sixty-two thousand, six hundred thirty-eight".