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68331208 = 2311799829
BaseRepresentation
bin1000001001010…
…10011011001000
311202120120210111
410010222123020
5114443044313
610440324104
71456543231
oct404523310
9152516714
1068331208
1135631280
121aa73634
131120608a
14910a088
155eeb43d
hex412a6c8

68331208 has 32 divisors (see below), whose sum is σ = 141552000. Its totient is φ = 30663360.

The previous prime is 68331203. The next prime is 68331209. The reversal of 68331208 is 80213386.

It is a self number, because there is not a number n which added to its sum of digits gives 68331208.

It is not an unprimeable number, because it can be changed into a prime (68331203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2038 + ... + 11866.

It is an arithmetic number, because the mean of its divisors is an integer number (4423500).

Almost surely, 268331208 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 68331208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70776000).

68331208 is an abundant number, since it is smaller than the sum of its proper divisors (73220792).

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

68331208 is a wasteful number, since it uses less digits than its factorization.

68331208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9925 (or 9921 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 68331208 is about 8266.2692915244. The cubic root of 68331208 is about 408.8271218967.

The spelling of 68331208 in words is "sixty-eight million, three hundred thirty-one thousand, two hundred eight".

Divisors: 1 2 4 8 11 22 44 79 88 158 316 632 869 1738 3476 6952 9829 19658 39316 78632 108119 216238 432476 776491 864952 1552982 3105964 6211928 8541401 17082802 34165604 68331208