129840160 has 24 divisors (see below), whose sum is σ = 306747756. Its totient is φ = 51936000.

The previous prime is 129840157. The next prime is 129840173. The reversal of 129840160 is 61048921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120912016 + 8928144 = 10996^2 + 2988^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405591 + ... + 405910.

Almost surely, 2^129840160 is an apocalyptic number.

129840160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129840160 is an abundant number, since it is smaller than the sum of its proper divisors (176907596).

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

129840160 is an equidigital number, since it uses as much as digits as its factorization.

129840160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811516 (or 811508 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 129840160 is about 11394.7426473791. The cubic root of 129840160 is about 506.3719970173.

The spelling of 129840160 in words is "one hundred twenty-nine million, eight hundred forty thousand, one hundred sixty".