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68168 = 238521
BaseRepresentation
bin10000101001001000
310110111202
4100221020
54140133
61243332
7402512
oct205110
9113452
1068168
1147241
1233548
1325049
141abb2
15152e8
hex10a48

68168 has 8 divisors (see below), whose sum is σ = 127830. Its totient is φ = 34080.

The previous prime is 68161. The next prime is 68171. The reversal of 68168 is 86186.

It can be written as a sum of positive squares in only one way, i.e., 58564 + 9604 = 242^2 + 98^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 68168.

It is not an unprimeable number, because it can be changed into a prime (68161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4253 + ... + 4268.

268168 is an apocalyptic number.

It is an amenable number.

68168 is a deficient number, since it is larger than the sum of its proper divisors (59662).

68168 is a wasteful number, since it uses less digits than its factorization.

68168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527 (or 8523 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 68168 is about 261.0900227891. The cubic root of 68168 is about 40.8501370055.

The spelling of 68168 in words is "sixty-eight thousand, one hundred sixty-eight".

Divisors: 1 2 4 8 8521 17042 34084 68168