168431140 has 12 divisors (see below), whose sum is σ = 353705436. Its totient is φ = 67372448.

The previous prime is 168431113. The next prime is 168431147. The reversal of 168431140 is 41134861.

168431140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 28387584 + 140043556 = 5328^2 + 11834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168431099 and 168431108.

It is not an unprimeable number, because it can be changed into a prime (168431147) 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, 4210759 + ... + 4210798.

It is an arithmetic number, because the mean of its divisors is an integer number (29475453).

Almost surely, 2^168431140 is an apocalyptic number.

168431140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168431140 is an abundant number, since it is smaller than the sum of its proper divisors (185274296).

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

168431140 is a wasteful number, since it uses less digits than its factorization.

168431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421566 (or 8421564 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 168431140 is about 12978.1023266115. The cubic root of 168431140 is about 552.2564489631.

The spelling of 168431140 in words is "one hundred sixty-eight million, four hundred thirty-one thousand, one hundred forty".