81748 has 12 divisors (see below), whose sum is σ = 145152. Its totient is φ = 40280.

The previous prime is 81737. The next prime is 81749. The reversal of 81748 is 84718.

81748 is nontrivially palindromic in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81749) by changing a digit.

81748 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333 + ... + 523.

It is an arithmetic number, because the mean of its divisors is an integer number (12096).

2⁸¹⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

81748 is a deficient number, since it is larger than the sum of its proper divisors (63404).

81748 is a wasteful number, since it uses less digits than its factorization.

81748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 300 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 81748 is about 285.9160716014. The cubic root of 81748 is about 43.4002647453.

The spelling of 81748 in words is "eighty-one thousand, seven hundred forty-eight".