81446 has 8 divisors (see below), whose sum is σ = 123384. Its totient is φ = 40320.

The previous prime is 81439. The next prime is 81457. The reversal of 81446 is 64418.

It is a happy number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281 + ... + 491.

It is an arithmetic number, because the mean of its divisors is an integer number (15423).

2⁸¹⁴⁴⁶ is an apocalyptic number.

81446 is a deficient number, since it is larger than the sum of its proper divisors (41938).

81446 is a wasteful number, since it uses less digits than its factorization.

81446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406.

The product of its digits is 768, while the sum is 23.

The square root of 81446 is about 285.3874559261. The cubic root of 81446 is about 43.3467545541.

The spelling of 81446 in words is "eighty-one thousand, four hundred forty-six".