799807998 has 64 divisors (see below), whose sum is σ = 1843421184. Its totient is φ = 229068000.

The previous prime is 799807963. The next prime is 799807999. The reversal of 799807998 is 899708997.

It is a super-3 number, since 3×799807998³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799807999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83433 + ... + 92523.

It is an arithmetic number, because the mean of its divisors is an integer number (28803456).

Almost surely, 2^799807998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 799807998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921710592).

799807998 is an abundant number, since it is smaller than the sum of its proper divisors (1043613186).

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

799807998 is a wasteful number, since it uses less digits than its factorization.

799807998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9181.

The product of its (nonzero) digits is 20575296, while the sum is 66.

The square root of 799807998 is about 28280.8768958814. The cubic root of 799807998 is about 928.2434945855.

Subtracting 799807998 from its reverse (899708997), we obtain a palindrome (99900999).

It can be divided in two parts, 79980 and 7998, that added together give a palindrome (87978).

The spelling of 799807998 in words is "seven hundred ninety-nine million, eight hundred seven thousand, nine hundred ninety-eight".