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6885 = 34517
BaseRepresentation
bin1101011100101
3100110000
41223211
5210020
651513
726034
oct15345
910400
106885
11519a
123b99
133198
14271b
152090
hex1ae5

6885 has 20 divisors (see below), whose sum is σ = 13068. Its totient is φ = 3456.

The previous prime is 6883. The next prime is 6899. The reversal of 6885 is 5886.

6885 = T32 + T33 + ... + T41.

It can be written as a sum of positive squares in 2 ways, for example, as 3969 + 2916 = 63^2 + 54^2 .

It is not a de Polignac number, because 6885 - 21 = 6883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6883) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 397 + ... + 413.

26885 is an apocalyptic number.

It is an amenable number.

6885 is a deficient number, since it is larger than the sum of its proper divisors (6183).

6885 is a wasteful number, since it uses less digits than its factorization.

6885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34 (or 25 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 6885 is about 82.9759001156. The cubic root of 6885 is about 19.0239771162.

Subtracting from 6885 its reverse (5886), we obtain a palindrome (999).

It can be divided in two parts, 68 and 85, that added together give a triangular number (153 = T17).

The spelling of 6885 in words is "six thousand, eight hundred eighty-five".

Divisors: 1 3 5 9 15 17 27 45 51 81 85 135 153 255 405 459 765 1377 2295 6885