812000000 has 252 divisors, whose sum is σ = 2395281840. Its totient is φ = 268800000.

The previous prime is 811999997. The next prime is 812000023. The reversal of 812000000 is 218.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 27999986 + ... + 28000014.

Almost surely, 2^812000000 is an apocalyptic number.

812000000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197640920).

812000000 is an abundant number, since it is smaller than the sum of its proper divisors (1583281840).

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

812000000 is an frugal number, since it uses more digits than its factorization.

812000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 812000000 is about 28495.6136975500. The cubic root of 812000000 is about 932.9363390986.

Adding to 812000000 its reverse (218), we get a palindrome (812000218).

The spelling of 812000000 in words is "eight hundred twelve million", and thus it is an aban number.