81382 has 8 divisors (see below), whose sum is σ = 139536. Its totient is φ = 34872.

The previous prime is 81373. The next prime is 81401. The reversal of 81382 is 28318.

81382 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

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

It is a congruent number.

It is an unprimeable 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, 2893 + ... + 2920.

It is an arithmetic number, because the mean of its divisors is an integer number (17442).

2⁸¹³⁸² is an apocalyptic number.

81382 is a deficient number, since it is larger than the sum of its proper divisors (58154).

81382 is a wasteful number, since it uses less digits than its factorization.

81382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822.

The product of its digits is 384, while the sum is 22.

The square root of 81382 is about 285.2753056260. The cubic root of 81382 is about 43.3353976663.

It can be divided in two parts, 813 and 82, that multiplied together give a palindrome (66666).

The spelling of 81382 in words is "eighty-one thousand, three hundred eighty-two".