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6868 = 2217101
BaseRepresentation
bin1101011010100
3100102101
41223110
5204433
651444
726011
oct15324
910371
106868
115184
123b84
133184
142708
15207d

6868 has 12 divisors (see below), whose sum is σ = 12852. Its totient is φ = 3200.

The previous prime is 6863. The next prime is 6869. The reversal of 6868 is 8686.

It can be written as a sum of positive squares in 2 ways, for example, as 6084 + 784 = 78^2 + 28^2 .

6868 is an undulating number in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6863) 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 3 ways as a sum of consecutive naturals, for example, 18 + ... + 118.

It is an arithmetic number, because the mean of its divisors is an integer number (1071).

26868 is an apocalyptic number.

6868 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6868 is a deficient number, since it is larger than the sum of its proper divisors (5984).

6868 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (6867) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (122).

6868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 120 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 6868 is about 82.8733974204. The cubic root of 6868 is about 19.0083066172.

It can be divided in two parts, 68 and 68, that added together give a triangular number (136 = T16).

The spelling of 6868 in words is "six thousand, eight hundred sixty-eight".

Divisors: 1 2 4 17 34 68 101 202 404 1717 3434 6868