129272880 has 160 divisors (see below), whose sum is σ = 456399360. Its totient is φ = 29962240.

The previous prime is 129272873. The next prime is 129272881. The reversal of 129272880 is 88272921.

It is a super-2 number, since 2×129272880² = 33422955006988800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129272881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59656 + ... + 61784.

It is an arithmetic number, because the mean of its divisors is an integer number (2852496).

Almost surely, 2^129272880 is an apocalyptic number.

129272880 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 129272880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228199680).

129272880 is an abundant number, since it is smaller than the sum of its proper divisors (327126480).

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

129272880 is a wasteful number, since it uses less digits than its factorization.

129272880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179 (or 2173 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 129272880 is about 11369.8232176230. The cubic root of 129272880 is about 505.6334631420.

The spelling of 129272880 in words is "one hundred twenty-nine million, two hundred seventy-two thousand, eight hundred eighty".