168040 has 16 divisors (see below), whose sum is σ = 378180. Its totient is φ = 67200.

The previous prime is 168037. The next prime is 168043. The reversal of 168040 is 40861.

It is an interprime number because it is at equal distance from previous prime (168037) and next prime (168043).

It can be written as a sum of positive squares in 2 ways, for example, as 148996 + 19044 = 386^2 + 138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 167999 and 168017.

It is not an unprimeable number, because it can be changed into a prime (168043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061 + ... + 2140.

2¹⁶⁸⁰⁴⁰ is an apocalyptic number.

168040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168040 is an abundant number, since it is smaller than the sum of its proper divisors (210140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168040 is a wasteful number, since it uses less digits than its factorization.

168040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212 (or 4208 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 168040 is about 409.9268227379. The cubic root of 168040 is about 55.1828624248.

The spelling of 168040 in words is "one hundred sixty-eight thousand, forty".