799999720 has 32 divisors (see below), whose sum is σ = 1938462120. Its totient is φ = 295384320.

The previous prime is 799999663. The next prime is 799999721. The reversal of 799999720 is 27999997.

It can be written as a sum of positive squares in 4 ways, for example, as 612364516 + 187635204 = 24746^2 + 13698^2 .

It is not an unprimeable number, because it can be changed into a prime (799999721) 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 7 ways as a sum of consecutive naturals, for example, 768711 + ... + 769750.

Almost surely, 2^799999720 is an apocalyptic number.

It is an amenable number.

799999720 is an abundant number, since it is smaller than the sum of its proper divisors (1138462400).

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

799999720 is a wasteful number, since it uses less digits than its factorization.

799999720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538485 (or 1538481 counting only the distinct ones).

The product of its (nonzero) digits is 5786802, while the sum is 61.

The square root of 799999720 is about 28284.2662977140. The cubic root of 799999720 is about 928.3176584188.

The spelling of 799999720 in words is "seven hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred twenty".