812680 has 32 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 295360.

The previous prime is 812671. The next prime is 812681. The reversal of 812680 is 86218.

It is not an unprimeable number, because it can be changed into a prime (812681) by changing a digit.

812680 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 7 ways as a sum of consecutive naturals, for example, 484 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (62370).

2⁸¹²⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

812680 is an abundant number, since it is smaller than the sum of its proper divisors (1183160).

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

812680 is a wasteful number, since it uses less digits than its factorization.

812680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869 (or 1865 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 812680 is about 901.4876593720. The cubic root of 812680 is about 93.3196692015.

Adding to 812680 its reverse (86218), we get a palindrome (898898).

The spelling of 812680 in words is "eight hundred twelve thousand, six hundred eighty".