819404412 has 48 divisors (see below), whose sum is σ = 2018567040. Its totient is φ = 257988672.

The previous prime is 819404389. The next prime is 819404419. The reversal of 819404412 is 214404918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819404419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73938 + ... + 84294.

It is an arithmetic number, because the mean of its divisors is an integer number (42053480).

Almost surely, 2^819404412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 819404412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1009283520).

819404412 is an abundant number, since it is smaller than the sum of its proper divisors (1199162628).

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

819404412 is a wasteful number, since it uses less digits than its factorization.

819404412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10730 (or 10728 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 819404412 is about 28625.2408199477. The cubic root of 819404412 is about 935.7634958383.

The spelling of 819404412 in words is "eight hundred nineteen million, four hundred four thousand, four hundred twelve".