812004440000 has 420 divisors, whose sum is σ = 2201670502416. Its totient is φ = 296884224000.

The previous prime is 812004439957. The next prime is 812004440087. The reversal of 812004440000 is 44400218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 763879469 + ... + 763880531.

Almost surely, 2^812004440000 is an apocalyptic number.

812004440000 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 812004440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100835251208).

812004440000 is an abundant number, since it is smaller than the sum of its proper divisors (1389666062416).

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

812004440000 is a wasteful number, since it uses less digits than its factorization.

812004440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 812004440000 its reverse (44400218), we get a palindrome (812048840218).

The spelling of 812004440000 in words is "eight hundred twelve billion, four million, four hundred forty thousand".