67856 has 10 divisors (see below), whose sum is σ = 131502. Its totient is φ = 33920.

The previous prime is 67853. The next prime is 67867. The reversal of 67856 is 65876.

It can be written as a sum of positive squares in only one way, i.e., 67600 + 256 = 260^2 + 16^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (67853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105 + ... + 2136.

2⁶⁷⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

67856 is a deficient number, since it is larger than the sum of its proper divisors (63646).

67856 is a wasteful number, since it uses less digits than its factorization.

67856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249 (or 4243 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 67856 is about 260.4918424826. The cubic root of 67856 is about 40.7877189745.

The spelling of 67856 in words is "sixty-seven thousand, eight hundred fifty-six".