129755080 has 128 divisors (see below), whose sum is σ = 368121600. Its totient is φ = 40061952.

The previous prime is 129755053. The next prime is 129755111. The reversal of 129755080 is 80557921.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156106 + ... + 156934.

It is an arithmetic number, because the mean of its divisors is an integer number (2875950).

Almost surely, 2^129755080 is an apocalyptic number.

129755080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129755080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184060800).

129755080 is an abundant number, since it is smaller than the sum of its proper divisors (238366520).

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

129755080 is a wasteful number, since it uses less digits than its factorization.

129755080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 129755080 is about 11391.0087349629. The cubic root of 129755080 is about 506.2613698610.

The spelling of 129755080 in words is "one hundred twenty-nine million, seven hundred fifty-five thousand, eighty".