800808080 has 20 divisors (see below), whose sum is σ = 1861878972. Its totient is φ = 320323200.

The previous prime is 800808031. The next prime is 800808091. The reversal of 800808080 is 80808008.

It can be written as a sum of positive squares in 2 ways, for example, as 203689984 + 597118096 = 14272^2 + 24436^2 .

It is a tau number, because it is divible by the number of its divisors (20).

800808080 is a modest number, since divided by 808080 gives 800 as remainder.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5004971 + ... + 5005130.

Almost surely, 2^800808080 is an apocalyptic number.

800808080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

800808080 is an abundant number, since it is smaller than the sum of its proper divisors (1061070892).

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

800808080 is a wasteful number, since it uses less digits than its factorization.

800808080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010114 (or 10010108 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 800808080 is about 28298.5526131638. The cubic root of 800808080 is about 928.6302261331.

The spelling of 800808080 in words is "eight hundred million, eight hundred eight thousand, eighty".