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12808800 = 253352593
BaseRepresentation
bin110000110111…
…001001100000
3220002202101000
4300313021200
511234340200
61134312000
7213605304
oct60671140
926082330
1012808800
117259494
124358600
132866194
1419b5d04
1511d0300
hexc37260

12808800 has 144 divisors (see below), whose sum is σ = 46403280. Its totient is φ = 3409920.

The previous prime is 12808777. The next prime is 12808801. The reversal of 12808800 is 880821.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12808801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21304 + ... + 21896.

It is an arithmetic number, because the mean of its divisors is an integer number (322245).

Almost surely, 212808800 is an apocalyptic number.

12808800 is a gapful number since it is divisible by the number (10) 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 12808800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23201640).

12808800 is an abundant number, since it is smaller than the sum of its proper divisors (33594480).

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

12808800 is a wasteful number, since it uses less digits than its factorization.

12808800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 12808800 is about 3578.9383900816. The cubic root of 12808800 is about 233.9750137687.

The spelling of 12808800 in words is "twelve million, eight hundred eight thousand, eight hundred".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 27 30 32 36 40 45 48 50 54 60 72 75 80 90 96 100 108 120 135 144 150 160 180 200 216 225 240 270 288 300 360 400 432 450 480 540 593 600 675 720 800 864 900 1080 1186 1200 1350 1440 1779 1800 2160 2372 2400 2700 2965 3558 3600 4320 4744 5337 5400 5930 7116 7200 8895 9488 10674 10800 11860 14232 14825 16011 17790 18976 21348 21600 23720 26685 28464 29650 32022 35580 42696 44475 47440 53370 56928 59300 64044 71160 80055 85392 88950 94880 106740 118600 128088 133425 142320 160110 170784 177900 213480 237200 256176 266850 284640 320220 355800 400275 426960 474400 512352 533700 640440 711600 800550 853920 1067400 1280880 1423200 1601100 2134800 2561760 3202200 4269600 6404400 12808800