168335140 has 24 divisors (see below), whose sum is σ = 365694840. Its totient is φ = 65011968.

The previous prime is 168335129. The next prime is 168335147. The reversal of 168335140 is 41533861.

It can be written as a sum of positive squares in 4 ways, for example, as 42536484 + 125798656 = 6522^2 + 11216^2 .

It is not an unprimeable number, because it can be changed into a prime (168335147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144537 + ... + 145696.

It is an arithmetic number, because the mean of its divisors is an integer number (15237285).

Almost surely, 2^168335140 is an apocalyptic number.

168335140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168335140 is an abundant number, since it is smaller than the sum of its proper divisors (197359700).

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

168335140 is a wasteful number, since it uses less digits than its factorization.

168335140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290271 (or 290269 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 168335140 is about 12974.4032618075. The cubic root of 168335140 is about 552.1515065816.

The spelling of 168335140 in words is "one hundred sixty-eight million, three hundred thirty-five thousand, one hundred forty".