81338 has 8 divisors (see below), whose sum is σ = 124032. Its totient is φ = 39996.

The previous prime is 81331. The next prime is 81343. The reversal of 81338 is 83318.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81331) 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, 170 + ... + 437.

It is an arithmetic number, because the mean of its divisors is an integer number (15504).

2⁸¹³³⁸ is an apocalyptic number.

81338 is a deficient number, since it is larger than the sum of its proper divisors (42694).

81338 is a wasteful number, since it uses less digits than its factorization.

81338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its digits is 576, while the sum is 23.

The square root of 81338 is about 285.1981767123. The cubic root of 81338 is about 43.3275863516.

The spelling of 81338 in words is "eighty-one thousand, three hundred thirty-eight".