798505818 has 64 divisors (see below), whose sum is σ = 1846471680. Its totient is φ = 227664000.

The previous prime is 798505817. The next prime is 798505819. The reversal of 798505818 is 818505897.

It is an interprime number because it is at equal distance from previous prime (798505817) and next prime (798505819).

It is a super-2 number, since 2×798505818² = 1275223082759698248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (798505811) 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 31 ways as a sum of consecutive naturals, for example, 187246 + ... + 191462.

It is an arithmetic number, because the mean of its divisors is an integer number (28851120).

Almost surely, 2^798505818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 798505818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923235840).

798505818 is an abundant number, since it is smaller than the sum of its proper divisors (1047965862).

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

798505818 is a wasteful number, since it uses less digits than its factorization.

798505818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403.

The product of its (nonzero) digits is 806400, while the sum is 51.

The square root of 798505818 is about 28257.8452469398. The cubic root of 798505818 is about 927.7394583249.

The spelling of 798505818 in words is "seven hundred ninety-eight million, five hundred five thousand, eight hundred eighteen".