812080 has 20 divisors (see below), whose sum is σ = 1888272. Its totient is φ = 324800.

The previous prime is 812057. The next prime is 812081. The reversal of 812080 is 80218.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (812081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4996 + ... + 5155.

2⁸¹²⁰⁸⁰ is an apocalyptic number.

812080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

812080 is an abundant number, since it is smaller than the sum of its proper divisors (1076192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812080 is a wasteful number, since it uses less digits than its factorization.

812080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10164 (or 10158 counting only the distinct ones).

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

The square root of 812080 is about 901.1548146684. The cubic root of 812080 is about 93.2966976396.

Adding to 812080 its reverse (80218), we get a palindrome (892298).

The spelling of 812080 in words is "eight hundred twelve thousand, eighty".