819899808 has 192 divisors, whose sum is σ = 2673377280. Its totient is φ = 214244352.

The previous prime is 819899797. The next prime is 819899827. The reversal of 819899808 is 808998918.

819899808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1109103 + ... + 1109841.

It is an arithmetic number, because the mean of its divisors is an integer number (13923840).

Almost surely, 2^819899808 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 819899808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1336688640).

819899808 is an abundant number, since it is smaller than the sum of its proper divisors (1853477472).

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

819899808 is a wasteful number, since it uses less digits than its factorization.

819899808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 60.

The square root of 819899808 is about 28633.8926449060. The cubic root of 819899808 is about 935.9520393279.

The spelling of 819899808 in words is "eight hundred nineteen million, eight hundred ninety-nine thousand, eight hundred eight".