129512880 has 180 divisors, whose sum is σ = 506097072. Its totient is φ = 29594880.

The previous prime is 129512857. The next prime is 129512881. The reversal of 129512880 is 88215921.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-3 number, since 3×129512880³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (129512881) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33445 + ... + 37115.

Almost surely, 2^129512880 is an apocalyptic number.

129512880 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 129512880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253048536).

129512880 is an abundant number, since it is smaller than the sum of its proper divisors (376584192).

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

129512880 is a wasteful number, since it uses less digits than its factorization.

129512880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704 (or 3688 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 129512880 is about 11380.3725773808. The cubic root of 129512880 is about 505.9461789266.

The spelling of 129512880 in words is "one hundred twenty-nine million, five hundred twelve thousand, eight hundred eighty".