799643856 has 80 divisors (see below), whose sum is σ = 2259230400. Its totient is φ = 241704960.

The previous prime is 799643837. The next prime is 799643879. The reversal of 799643856 is 658346997.

It is a happy number.

799643856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 799643796 and 799643805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235386 + ... + 238758.

It is an arithmetic number, because the mean of its divisors is an integer number (28240380).

Almost surely, 2^799643856 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 799643856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129615200).

799643856 is an abundant number, since it is smaller than the sum of its proper divisors (1459586544).

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

799643856 is a wasteful number, since it uses less digits than its factorization.

799643856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3844 (or 3838 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 57.

The square root of 799643856 is about 28277.9747506783. The cubic root of 799643856 is about 928.1799901076.

The spelling of 799643856 in words is "seven hundred ninety-nine million, six hundred forty-three thousand, eight hundred fifty-six".