80805 has 8 divisors (see below), whose sum is σ = 129312. Its totient is φ = 43088.

The previous prime is 80803. The next prime is 80809. The reversal of 80805 is 50808.

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

It is a cyclic number.

It is not a de Polignac number, because 80805 - 2¹ = 80803 is a prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2679 + ... + 2708.

It is an arithmetic number, because the mean of its divisors is an integer number (16164).

2⁸⁰⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

80805 is a deficient number, since it is larger than the sum of its proper divisors (48507).

80805 is a wasteful number, since it uses less digits than its factorization.

80805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 80805 is about 284.2622029043. The cubic root of 80805 is about 43.2327383865.

The spelling of 80805 in words is "eighty thousand, eight hundred five".