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808884880 = 24510111061
BaseRepresentation
bin110000001101101…
…001101010010000
32002101001121110021
4300031221222100
53124033304010
6212133113224
726021256646
oct6015515220
92071047407
10808884880
1138565a201
121a6a88814
13cb77400b
14795dd196
154b02e8da
hex30369a90

808884880 has 20 divisors (see below), whose sum is σ = 1880657532. Its totient is φ = 323553920.

The previous prime is 808884851. The next prime is 808884889. The reversal of 808884880 is 88488808.

It can be written as a sum of positive squares in 2 ways, for example, as 305690256 + 503194624 = 17484^2 + 22432^2 .

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

It is a super-2 number, since 2×8088848802 = 1308589498185228800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (808884889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055451 + ... + 5055610.

Almost surely, 2808884880 is an apocalyptic number.

808884880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

808884880 is an abundant number, since it is smaller than the sum of its proper divisors (1071772652).

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

808884880 is a wasteful number, since it uses less digits than its factorization.

808884880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111074 (or 10111068 counting only the distinct ones).

The product of its (nonzero) digits is 1048576, while the sum is 52.

The square root of 808884880 is about 28440.9015328277. The cubic root of 808884880 is about 931.7417853196.

The spelling of 808884880 in words is "eight hundred eight million, eight hundred eighty-four thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 10111061 20222122 40444244 50555305 80888488 101110610 161776976 202221220 404442440 808884880