129835072 has 28 divisors (see below), whose sum is σ = 264609580. Its totient is φ = 63161856.

The previous prime is 129835067. The next prime is 129835087. The reversal of 129835072 is 270538921.

It can be written as a sum of positive squares in 2 ways, for example, as 72318016 + 57517056 = 8504^2 + 7584^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25047 + ... + 29782.

Almost surely, 2^129835072 is an apocalyptic number.

It is an amenable number.

129835072 is an abundant number, since it is smaller than the sum of its proper divisors (134774508).

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

129835072 is an equidigital number, since it uses as much as digits as its factorization.

129835072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54878 (or 54868 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 129835072 is about 11394.5193843356. The cubic root of 129835072 is about 506.3653825914.

The spelling of 129835072 in words is "one hundred twenty-nine million, eight hundred thirty-five thousand, seventy-two".