168240140 has 24 divisors (see below), whose sum is σ = 354282432. Its totient is φ = 67109760.

The previous prime is 168240139. The next prime is 168240157. The reversal of 168240140 is 41042861.

168240140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121 + ... + 18800.

It is an arithmetic number, because the mean of its divisors is an integer number (14761768).

Almost surely, 2^168240140 is an apocalyptic number.

168240140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168240140 is an abundant number, since it is smaller than the sum of its proper divisors (186042292).

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

168240140 is a wasteful number, since it uses less digits than its factorization.

168240140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23297 (or 23295 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 168240140 is about 12970.7416904354. The cubic root of 168240140 is about 552.0476180653.

The spelling of 168240140 in words is "one hundred sixty-eight million, two hundred forty thousand, one hundred forty".