129296020 has 24 divisors (see below), whose sum is σ = 310310784. Its totient is φ = 44330016.

The previous prime is 129295987. The next prime is 129296039. The reversal of 129296020 is 20692921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461632 + ... + 461911.

It is an arithmetic number, because the mean of its divisors is an integer number (12929616).

Almost surely, 2^129296020 is an apocalyptic number.

129296020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129296020 is an abundant number, since it is smaller than the sum of its proper divisors (181014764).

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

129296020 is a wasteful number, since it uses less digits than its factorization.

129296020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923559 (or 923557 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 129296020 is about 11370.8407780603. The cubic root of 129296020 is about 505.6636310067.

The spelling of 129296020 in words is "one hundred twenty-nine million, two hundred ninety-six thousand, twenty".