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68288916 = 22312744809
BaseRepresentation
bin1000001001000…
…00000110010100
311202111102210010
410010200012110
5114440221131
610435400220
71456306023
oct404400624
9152442703
1068288916
1135602523
121aa53070
13111bca57
1490d88ba
155eddb46
hex4120194

68288916 has 24 divisors (see below), whose sum is σ = 160599040. Its totient is φ = 22583232.

The previous prime is 68288887. The next prime is 68288917. The reversal of 68288916 is 61988286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68288917) 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 7 ways as a sum of consecutive naturals, for example, 20881 + ... + 23928.

Almost surely, 268288916 is an apocalyptic number.

It is an amenable number.

68288916 is an abundant number, since it is smaller than the sum of its proper divisors (92310124).

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

68288916 is a wasteful number, since it uses less digits than its factorization.

68288916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44943 (or 44941 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 68288916 is about 8263.7107887438. The cubic root of 68288916 is about 408.7427598340.

It can be divided in two parts, 682 and 88916, that added together give a palindrome (89598).

The spelling of 68288916 in words is "sixty-eight million, two hundred eighty-eight thousand, nine hundred sixteen".

Divisors: 1 2 3 4 6 12 127 254 381 508 762 1524 44809 89618 134427 179236 268854 537708 5690743 11381486 17072229 22762972 34144458 68288916