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68028800 = 275273037
BaseRepresentation
bin1000000111000…
…00100110000000
311202000012222012
410003200212000
5114403410200
610430032052
71454143460
oct403404600
9152005865
1068028800
1135445054
121a948628
131112b538
14906bba0
155e8ba35
hex40e0980

68028800 has 96 divisors (see below), whose sum is σ = 192123120. Its totient is φ = 23316480.

The previous prime is 68028791. The next prime is 68028803. The reversal of 68028800 is 882086.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68028803) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 20882 + ... + 23918.

Almost surely, 268028800 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 68028800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96061560).

68028800 is an abundant number, since it is smaller than the sum of its proper divisors (124094320).

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

68028800 is a wasteful number, since it uses less digits than its factorization.

68028800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068 (or 3051 counting only the distinct ones).

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

The square root of 68028800 is about 8247.9573228770. The cubic root of 68028800 is about 408.2231254247.

The spelling of 68028800 in words is "sixty-eight million, twenty-eight thousand, eight hundred".

Divisors: 1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 50 56 64 70 80 100 112 128 140 160 175 200 224 280 320 350 400 448 560 640 700 800 896 1120 1400 1600 2240 2800 3037 3200 4480 5600 6074 11200 12148 15185 21259 22400 24296 30370 42518 48592 60740 75925 85036 97184 106295 121480 151850 170072 194368 212590 242960 303700 340144 388736 425180 485920 531475 607400 680288 850360 971840 1062950 1214800 1360576 1700720 1943680 2125900 2429600 2721152 3401440 4251800 4859200 6802880 8503600 9718400 13605760 17007200 34014400 68028800