129896830 has 48 divisors (see below), whose sum is σ = 283903776. Its totient is φ = 41909760.

The previous prime is 129896827. The next prime is 129896869. The reversal of 129896830 is 38698921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17020 + ... + 23440.

It is an arithmetic number, because the mean of its divisors is an integer number (5914662).

Almost surely, 2^129896830 is an apocalyptic number.

129896830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129896830 is an abundant number, since it is smaller than the sum of its proper divisors (154006946).

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

129896830 is a wasteful number, since it uses less digits than its factorization.

129896830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6469 (or 6452 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 129896830 is about 11397.2290492031. The cubic root of 129896830 is about 506.4456566287.

The spelling of 129896830 in words is "one hundred twenty-nine million, eight hundred ninety-six thousand, eight hundred thirty".