80812 has 12 divisors (see below), whose sum is σ = 143640. Its totient is φ = 39776.

The previous prime is 80809. The next prime is 80819. The reversal of 80812 is 21808.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 80812.

It is not an unprimeable number, because it can be changed into a prime (80819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243 + ... + 469.

It is an arithmetic number, because the mean of its divisors is an integer number (11970).

2⁸⁰⁸¹² is an apocalyptic number.

It is an amenable number.

80812 is a deficient number, since it is larger than the sum of its proper divisors (62828).

80812 is a wasteful number, since it uses less digits than its factorization.

80812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 80812 is about 284.2745152137. The cubic root of 80812 is about 43.2339867434.

It can be divided in two parts, 808 and 12, that added together give a triangular number (820 = T₄₀).

The spelling of 80812 in words is "eighty thousand, eight hundred twelve".