816843744 has 192 divisors, whose sum is σ = 2656281600. Its totient is φ = 242694144.

The previous prime is 816843739. The next prime is 816843799. The reversal of 816843744 is 447348618.

It is a super-2 number, since 2×816843744² = 1334467404223875072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 816843744.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277609 + ... + 280535.

It is an arithmetic number, because the mean of its divisors is an integer number (13834800).

Almost surely, 2^816843744 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 816843744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328140800).

816843744 is an abundant number, since it is smaller than the sum of its proper divisors (1839437856).

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

816843744 is a wasteful number, since it uses less digits than its factorization.

816843744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982 (or 2968 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 816843744 is about 28580.4783724836. The cubic root of 816843744 is about 934.7877139185.

The spelling of 816843744 in words is "eight hundred sixteen million, eight hundred forty-three thousand, seven hundred forty-four".