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2008808080 = 24561411641
BaseRepresentation
bin111011110111011…
…1111101010010000
312011222221000122021
41313232333222100
513103223324310
6531155421224
7100531405216
oct16756775220
95158830567
102008808080
11940a13274
124808b4814
1326023c546
14150b0ccb6
15bb5525da
hex77bbfa90

2008808080 has 40 divisors (see below), whose sum is σ = 4747055544. Its totient is φ = 790348800.

The previous prime is 2008808071. The next prime is 2008808083. The reversal of 2008808080 is 808088002.

It can be written as a sum of positive squares in 4 ways, for example, as 13220496 + 1995587584 = 3636^2 + 44672^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2008808083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200941 + ... + 210700.

Almost surely, 22008808080 is an apocalyptic number.

2008808080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2008808080 is an abundant number, since it is smaller than the sum of its proper divisors (2738247464).

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

2008808080 is a wasteful number, since it uses less digits than its factorization.

2008808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411715 (or 411709 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 2008808080 is about 44819.7286917268. The cubic root of 2008808080 is about 1261.7679222095.

The spelling of 2008808080 in words is "two billion, eight million, eight hundred eight thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 40 61 80 122 244 305 488 610 976 1220 2440 4880 411641 823282 1646564 2058205 3293128 4116410 6586256 8232820 16465640 25110101 32931280 50220202 100440404 125550505 200880808 251101010 401761616 502202020 1004404040 2008808080