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68208800 = 25521123337
BaseRepresentation
bin1000001000011…
…00100010100000
311202100100212212
410010030202200
5114430140200
610433541252
71455523322
oct404144240
9152310785
1068208800
1135558310
121aa14828
131119244a
1490b7612
155ec5035
hex410c8a0

68208800 has 144 divisors (see below), whose sum is σ = 190112832. Its totient is φ = 23654400.

The previous prime is 68208761. The next prime is 68208851. The reversal of 68208800 is 880286.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202232 + ... + 202568.

It is an arithmetic number, because the mean of its divisors is an integer number (1320228).

Almost surely, 268208800 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68208800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95056416).

68208800 is an abundant number, since it is smaller than the sum of its proper divisors (121904032).

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

68208800 is a wasteful number, since it uses less digits than its factorization.

68208800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 68208800 is about 8258.8619070669. The cubic root of 68208800 is about 408.5828527250.

The spelling of 68208800 in words is "sixty-eight million, two hundred eight thousand, eight hundred".

Divisors: 1 2 4 5 8 10 11 16 20 22 23 25 32 40 44 46 50 55 80 88 92 100 110 115 160 176 184 200 220 230 253 275 337 352 368 400 440 460 506 550 575 674 736 800 880 920 1012 1100 1150 1265 1348 1685 1760 1840 2024 2200 2300 2530 2696 3370 3680 3707 4048 4400 4600 5060 5392 6325 6740 7414 7751 8096 8425 8800 9200 10120 10784 12650 13480 14828 15502 16850 18400 18535 20240 25300 26960 29656 31004 33700 37070 38755 40480 50600 53920 59312 62008 67400 74140 77510 85261 92675 101200 118624 124016 134800 148280 155020 170522 185350 193775 202400 248032 269600 296560 310040 341044 370700 387550 426305 593120 620080 682088 741400 775100 852610 1240160 1364176 1482800 1550200 1705220 2131525 2728352 2965600 3100400 3410440 4263050 6200800 6820880 8526100 13641760 17052200 34104400 68208800