129011080 has 32 divisors (see below), whose sum is σ = 316664640. Its totient is φ = 46912960.

The previous prime is 129011039. The next prime is 129011081. The reversal of 129011080 is 80110921.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (129011081) 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, 146164 + ... + 147043.

It is an arithmetic number, because the mean of its divisors is an integer number (9895770).

Almost surely, 2^129011080 is an apocalyptic number.

129011080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129011080 is an abundant number, since it is smaller than the sum of its proper divisors (187653560).

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

129011080 is a wasteful number, since it uses less digits than its factorization.

129011080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293229 (or 293225 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 129011080 is about 11358.3044509293. The cubic root of 129011080 is about 505.2919006477.

The spelling of 129011080 in words is "one hundred twenty-nine million, eleven thousand, eighty".