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68819200 = 285210753
BaseRepresentation
bin1000001101000…
…01100100000000
311210111101012021
410012201210000
5120104203300
610455011224
71463645032
oct406414400
9153441167
1068819200
113593497a
121b069b14
1311347228
1491d5c52
156095d1a
hex41a1900

68819200 has 54 divisors (see below), whose sum is σ = 170354114. Its totient is φ = 27525120.

The previous prime is 68819167. The next prime is 68819207. The reversal of 68819200 is 291886.

It can be written as a sum of positive squares in 3 ways, for example, as 17438976 + 51380224 = 4176^2 + 7168^2 .

It is not an unprimeable number, because it can be changed into a prime (68819207) 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 5 ways as a sum of consecutive naturals, for example, 1024 + ... + 11776.

Almost surely, 268819200 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 68819200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85177057).

68819200 is an abundant number, since it is smaller than the sum of its proper divisors (101534914).

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

68819200 is a wasteful number, since it uses less digits than its factorization.

68819200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10779 (or 10760 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 68819200 is about 8295.7338433679. The cubic root of 68819200 is about 409.7980365605.

The spelling of 68819200 in words is "sixty-eight million, eight hundred nineteen thousand, two hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 128 160 200 256 320 400 640 800 1280 1600 3200 6400 10753 21506 43012 53765 86024 107530 172048 215060 268825 344096 430120 537650 688192 860240 1075300 1376384 1720480 2150600 2752768 3440960 4301200 6881920 8602400 13763840 17204800 34409600 68819200