80808080 has 80 divisors (see below), whose sum is σ = 193742064. Its totient is φ = 31334400.

The previous prime is 80808071. The next prime is 80808107. The reversal of 80808080 is 8080808.

It can be written as a sum of positive squares in 8 ways, for example, as 7054336 + 73753744 = 2656^2 + 8588^2 .

It is a tau number, because it is divible by the number of its divisors (80).

80808080 is an undulating number in base 10.

80808080 is a modest number, since divided by 808080 gives 80 as remainder.

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, 589772 + ... + 589908.

Almost surely, 2^80808080 is an apocalyptic number.

80808080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80808080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96871032).

80808080 is an abundant number, since it is smaller than the sum of its proper divisors (112933984).

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

80808080 is a wasteful number, since it uses less digits than its factorization.

80808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 318 counting only the distinct ones).

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

The square root of 80808080 is about 8989.3314545632. The cubic root of 80808080 is about 432.3328767242.

Adding to 80808080 its reverse (8080808), we get a palindrome (88888888).

The spelling of 80808080 in words is "eighty million, eight hundred eight thousand, eighty".