168406 has 16 divisors (see below), whose sum is σ = 301824. Its totient is φ = 68904.

The previous prime is 168391. The next prime is 168409. The reversal of 168406 is 604861.

168406 = T₁₁₆ + T₁₁₇ + ... + T₁₃₆.

168406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168409) by changing a digit.

168406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61 + ... + 583.

It is an arithmetic number, because the mean of its divisors is an integer number (18864).

2¹⁶⁸⁴⁰⁶ is an apocalyptic number.

168406 is a deficient number, since it is larger than the sum of its proper divisors (133418).

168406 is a wasteful number, since it uses less digits than its factorization.

168406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 168406 is about 410.3730010612. The cubic root of 168406 is about 55.2228971032. Note that the first 3 decimals are identical.

The spelling of 168406 in words is "one hundred sixty-eight thousand, four hundred six".